66 (sixty-six) is a positive integer following 65 and preceding 67. Its ordinal form is written "sixty-sixth" or 66th.

Properties

In googology

66.png

In Greek-based number-naming systems, 66 is associated with prefix "hexahexaconta-", and with prefix "sexasexaginti-" in Latin systems.

See also

Sources

  1. OEIS, sequence A002808 (accessed 2020-11-13)
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