78 (seventy-eight) is a positive integer following 77 and preceding 79. Its ordinal form is written "seventy-eighth" or 78th.

Properties Edit

78 is an even composite number.

78 is the 12th triangular number.

In googology Edit

In Greek-based number-naming systems, 78 is associated with prefix "octoheptaconta-", and with prefix "octoseptuaginti-" in Latin systems.