70 (seventy) is a positive integer following 69 and preceding 71. Its ordinal form is written "seventieth" or 70th.

Properties Edit

70 is an even composite number.

69! < googol < 70!. Many scientific calculators overflow at googol, so 70! is the least factorial number that cannot be stored on such calculators.

70 is the smallest weird number. That means it is abundant but not semiperfect.

In googology Edit


In Greek-based number-naming systems, 70 is associated with prefix "heptaconta-", and with prefix "septuaginti-" in Latin systems.