668630902 has 16 divisors (see below), whose sum is σ = 1050038640. Its totient is φ = 318896032.

The previous prime is 668630899. The next prime is 668630929. The reversal of 668630902 is 209036866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64633 + ... + 74260.

It is an arithmetic number, because the mean of its divisors is an integer number (65627415).

Almost surely, 2^668630902 is an apocalyptic number.

668630902 is a deficient number, since it is larger than the sum of its proper divisors (381407738).

668630902 is a wasteful number, since it uses less digits than its factorization.

668630902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139007.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 668630902 is about 25857.8982517915. The cubic root of 668630902 is about 874.4375823040.

The spelling of 668630902 in words is "six hundred sixty-eight million, six hundred thirty thousand, nine hundred two".