66

66 (sixty-six) is a positive integer following 65 and preceding 67. Its ordinal form is written "sixty-sixth" or 66th.
== Properties ==
*66 is an OEIS, sequence A002808 (accessed 2020-11-13).
*66 is the 11th .
*66 is a number.
*If you flip 66 upside down, it becomes 99.
== In googology ==
In Greek-based number-naming systems, 66 is associated with prefix "hexahexaconta-", and with prefix "sexasexaginti-" in Latin systems.
==See also==
*sixty-sixes
==Sources==
Category:Numbers
Category:Class 1
Category:Even numbers
Category:Numbers 0-99
Category:Numbers with 1 to 2 digits
Category:Repdigit numbers