68 (sixty-eight) is the natural number following 67 and preceding 69

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 NGC 68, a spiral galaxy in the constellation Andromeda

The Saros number 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 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.
• A publishing house in Canada for exiled Czech authors.

• Number of the best European ice hockey player in the NHL, Jaromir Jagr.

Sesenta y ocho | Sesdek ok | 68 (nombre) | 68 | 68 | Sessantotto | 68 (skaičius) | 68 (getal) | 68 | Sessenta e oito | 68 (число) | 68 (število) | 68 (tal) | 68