79 and preceding 81. Its ordinal form is written "eightieth" or 80th.80 (eighty) is a positive integer following
In chess Edit
It is also the number of possible bishop moves in 4×5 minichess.
In googology Edit
In Greek-based number-naming systems, 80 is associated with prefix "octaconta-", and with prefix "octoginti-" in Latin systems.