679877976961 has 4 divisors (see below), whose sum is σ = 715661028400. Its totient is φ = 644094925524.

The previous prime is 679877976917. The next prime is 679877977021. The reversal of 679877976961 is 169679778976.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 679877976961 - 2²³ = 679869588353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679877916961) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 17891525691 + ... + 17891525728.

It is an arithmetic number, because the mean of its divisors is an integer number (178915257100).

Almost surely, 2^679877976961 is an apocalyptic number.

It is an amenable number.

679877976961 is a deficient number, since it is larger than the sum of its proper divisors (35783051439).

679877976961 is a wasteful number, since it uses less digits than its factorization.

679877976961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35783051438.

The product of its digits is 3024568512, while the sum is 82.

The spelling of 679877976961 in words is "six hundred seventy-nine billion, eight hundred seventy-seven million, nine hundred seventy-six thousand, nine hundred sixty-one".