668964886 has 8 divisors (see below), whose sum is σ = 1009053720. Its totient is φ = 332613648.

The previous prime is 668964871. The next prime is 668964929. The reversal of 668964886 is 688469866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 933951 + ... + 934666.

It is an arithmetic number, because the mean of its divisors is an integer number (126131715).

Almost surely, 2^668964886 is an apocalyptic number.

668964886 is a deficient number, since it is larger than the sum of its proper divisors (340088834).

668964886 is a wasteful number, since it uses less digits than its factorization.

668964886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868798.

The product of its digits is 23887872, while the sum is 61.

The square root of 668964886 is about 25864.3555110117. The cubic root of 668964886 is about 874.5831531751.

The spelling of 668964886 in words is "six hundred sixty-eight million, nine hundred sixty-four thousand, eight hundred eighty-six".