78

78 (seventy-eight) is a positive integer following 77 and preceding 79. Its ordinal form is written "seventy-eighth" or 78th.
== Properties ==
*78 is an .
*78 is the 12th .
*78 is the atomic number of platinum.Los Alamos National Security, Periodic Table of Elements - Platinum
== In googology ==
In Greek-based number-naming systems, 78 is associated with prefix "octoheptaconta-", and with prefix "octoseptuaginti-" in Latin systems.
== Sources ==
Category:Numbers
Category:Class 1
Category:Even numbers
Category:Non-powers
Category:Numbers 0-99
Category:Numbers with 1 to 2 digits