68 (number)
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68 is the natural number following 67 and preceding 69
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| Cardinal | sixty-eight | ||
| Ordinal | 68th (sixty-eighth) | ||
| Factorization | <math>2^2 \cdot 17<math> | ||
| Divisors | 2, 4, 17, 34 | ||
| Roman numeral | LXVIII | ||
| Binary | 1000100 | ||
| Hexadecimal | 44 | ||
In mathematics
Sixty-eight is a nontotient.
In science
- The atomic number of erbium, a lanthanide
In astronomy,
- Messier object M68, a magnitude 9.0 globular cluster in the constellation Hydra
- The New General Catalogue object (http://www.ngcic.org/) NGC 68, a spiral galaxy in the constellation Andromeda
- The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/SEsaros/SEsaros1-175.html) of the solar eclipse series which began on -626 March 16 and ended on 685 August 20. The duration of Saros series 68 was 1280.1 years, and it contained 72 solar eclipses.
- The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/LEsaros/LEsaros1-175.html) of the lunar eclipse series which began on -613 July 3 and ended on 685 August 20. The duration of Saros series 68 was 1298.1 years, and it contained 73 lunar eclipses.
In other fields
- In degrees Celsius, the ideal temperature for developing black-and-white film.
- The designation of US Interstate 68, a freeway that runs from West Virginia to Maryland.
- The registry of the U.S. Navy's aircraft carrier USS Nimitz (CVN-68), named after Admiral Chester Nimitz.
- The number of the French department Haut-Rhin.
- The year AD 68, 68 BC, or 1968.es:Sesenta y ocho
eo:Sesdek ok ko:68 ia:68 it:Sessantotto ja:68 sl:68 (število) sv:68 (tal) zh:68