This article may contain indiscriminate, excessive, or irrelevant examples. (March 2010) |

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Cardinal | sixty-three | |||

Ordinal | 63rd (sixty-third) | |||

Factorization | 3^{2}× 7 | |||

Divisors | 1, 3, 7, 9, 21, 63 | |||

Greek numeral | ΞΓ´ | |||

Roman numeral | LXIII | |||

Binary | 111111_{2} | |||

Ternary | 2100_{3} | |||

Quaternary | 333_{4} | |||

Quinary | 223_{5} | |||

Senary | 143_{6} | |||

Octal | 77_{8} | |||

Duodecimal | 53_{12} | |||

Hexadecimal | 3F_{16} | |||

Vigesimal | 33_{20} | |||

Base 36 | 1R_{36} |

**63** (**sixty-three**) is a natural number following 62 and preceding 64.

## Contents

## In mathematics

**63** is:

- a deficient composite number.
- a highly cototient number.
^{[1]} - a number of the form 2
^{n}− 1 (with*n*= 6), but it is not a Mersenne prime since n is not prime and 63 is certainly not prime either. - a Woodall number i.e. of the form 2
^{n}*n*− 1 with*n*= 4.^{[2]} - the third Delannoy number.
^{[3]} - the smallest whole number that can be divided by any number from 1 to 9 without repeating decimals.
^{[importance?]} - the sum of the powers of 2 from 0 to 5.
- palindromic and a repdigit in bases 2 (111111
_{2}), 4 (333_{4}), 8 (77_{8}), 20 (33_{20}) and 62 (11_{62}).

## In science

- The atomic number of europium, a lanthanide

### Astronomy

- Messier object M63, a magnitude 8.5 galaxy in the constellation Canes Venatici, also known as the Sunflower Galaxy.
- The New General Catalogue object NGC 63, a spiral galaxy in the constellation Pisces

## In other fields

**Sixty-three** is also:

- The code for international direct dial calls to the Philippines
- The hull number of the U.S. Navy's aircraft carrier USS
*Kitty Hawk*(CV-63) and the USS Missouri BB63 - The number of the French department Puy-de-Dôme
- The number of groats in a guinea in British pre-decimal currency
- A card game, popular in Carleton County, New Brunswick
- The Stoner 63, a machine gun
- The number of chromosomes found in the offspring of a donkey and a horse
- Class of '63 was a TV movie starring James Brolin (1973)

## In sports

- Tom Dempsey of New Orleans Saints, Nov. 8, 1970, Jason Elam of the Denver Broncos, Oct. 25, 1988, Sebastian Janikowski of the Oakland Raiders, Sep. 12, 2011 and David Akers
^{[4]}of the San Francisco 49ers, Sept. 9, 2012 had NFL record 63-yard field goals - Michael Jordan scored a record 63 points in a Chicago Bulls –Boston Celtics (double-overtime) NBA playoff game on April 20, 1986
- In U.S. college athletics, schools that are members of NCAA Division I FCS are allowed to provide their football players with athletically-related financial aid equivalent to a total of 63 full athletic scholarships in a given season.
- Cricketer Phillip Hughes died during a match whilst on a personal score of 63 runs.

## In Religion

- There are 63 Tractates in the Mishna, the compilation of Jewish Law.
- There are 63 Saints (popularly known as Nayanmars) in South Indian Shaivism, particularly in Tamil Nadu, India.
- There are 63 Salakapurusas (great beings) in Jain cosmology.

## References

**^**"Sloane's A100827 : Highly cototient numbers".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-05-30.**^**"Sloane's A003261 : Woodall numbers".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-05-30.**^**"Sloane's A001850 : Central Delannoy numbers".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-05-30.**^**http://www.nfl.com/news/story/0ap1000000060091/article/david-akers-ties-nfl-record-with-63yard-field-goal