79566666666 has 32 divisors (see below), whose sum is σ = 159643578240. Its totient is φ = 26437238784.

The previous prime is 79566666653. The next prime is 79566666701. The reversal of 79566666666 is 66666666597.

79566666666 is a modest number, since divided by 666666 gives 79566 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 79566666666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7668330 + ... + 7678698.

It is an arithmetic number, because the mean of its divisors is an integer number (4988861820).

Almost surely, 2^79566666666 is an apocalyptic number.

79566666666 is an abundant number, since it is smaller than the sum of its proper divisors (80076911574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79566666666 is a wasteful number, since it uses less digits than its factorization.

79566666666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14350.

The product of its digits is 529079040, while the sum is 69.

Subtracting from 79566666666 its sum of digits (69), we obtain a palindrome (79566666597).

The spelling of 79566666666 in words is "seventy-nine billion, five hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-six".