Eighty-six (86, LXXXVI) is the natural number following eighty-five and preceeding eighty-seven.
- Hexadecimal: 56
- Binary: 01010110
- Factors: 1, 2, 43, 86.
- Factorization:
- Ordinal number: eighty-sixth
- the atomic number of radon (Rn)
- the model number of: F-86 Sabre, Ilyushin Il-86
- the model number of CPM-86,
- part of the model number of the X86 microprocessors
- used as a verb, to "eighty-six" means to "ignore" or "get rid of". This may originally be Cockney rhyming slang for the word "nix".
- In the TV series Get Smart, the principal character Maxwell Smart was known as Agent 86.
- the name of the band The Eighty-Six
- the number of the French department Vienne
- the designation of Interstate 86, a freeway in Idaho.
- the code for international direct dial phone calls to China
- the year AD 86 or AD 1986.