679664611771 has 2 divisors, whose sum is σ = 679664611772. Its totient is φ = 679664611770.

The previous prime is 679664611763. The next prime is 679664611841. The reversal of 679664611771 is 177116466976.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 679664611771 - 2³ = 679664611763 is a prime.

It is not a weakly prime, because it can be changed into another prime (679664621771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339832305885 + 339832305886.

It is an arithmetic number, because the mean of its divisors is an integer number (339832305886).

Almost surely, 2^679664611771 is an apocalyptic number.

679664611771 is a deficient number, since it is larger than the sum of its proper divisors (1).

679664611771 is an equidigital number, since it uses as much as digits as its factorization.

679664611771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16003008, while the sum is 61.

The spelling of 679664611771 in words is "six hundred seventy-nine billion, six hundred sixty-four million, six hundred eleven thousand, seven hundred seventy-one".