The Leviathan number in numerology is defined as the factorial of the 666th power of ten: (10666)!, which has approximately 6.65565705×10668 digits.
Earlier versions of this article stated that the Leviathan number can be written as 911^(911^911) which is however a completely different number with approximately 3.91257309×102696 digits:
The baby Leviathan number is the factorial of 666, which has 1,594 digits.
In Satanism and numerology, the number of the Leviathan is 3.