668756795 has 16 divisors (see below), whose sum is σ = 971103168. Its totient is φ = 431600640.

The previous prime is 668756789. The next prime is 668756807. The reversal of 668756795 is 597657866.

It is not a de Polignac number, because 668756795 - 2⁶ = 668756731 is a prime.

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, 561386 + ... + 562575.

It is an arithmetic number, because the mean of its divisors is an integer number (60693948).

Almost surely, 2^668756795 is an apocalyptic number.

668756795 is a deficient number, since it is larger than the sum of its proper divisors (302346373).

668756795 is a wasteful number, since it uses less digits than its factorization.

668756795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123990.

The product of its digits is 19051200, while the sum is 59.

The square root of 668756795 is about 25860.3324611266. The cubic root of 668756795 is about 874.4924599462.

The spelling of 668756795 in words is "six hundred sixty-eight million, seven hundred fifty-six thousand, seven hundred ninety-five".