84

84 (eighty-four) is a positive integer following 83 and preceding 85. Its ordinal form is written "eighty-fourth" or 84th.
== Properties ==
*84 is an .
*84 is the 7th .MathWorld, Tetrahedral Number
== In chess ==
It is also the number of possible king moves in 4×4 minichess.
== In googology ==
In Greek-based number-naming systems, 84 is associated with prefix "tetraoctaconta-", and with prefix "quattuoroctoginti-" in Latin systems.
== Sources ==
Category:Numbers
Category:Chess
Category:Class 1
Category:Even numbers
Category:Non-powers
Category:Numbers 0-99
Category:Numbers with 1 to 2 digits