668356902 has 24 divisors (see below), whose sum is σ = 1467946584. Its totient is φ = 219733344.

The previous prime is 668356889. The next prime is 668356943. The reversal of 668356902 is 209653866.

It is a happy number.

668356902 is a `hidden beast` number, since 6 + 6 + 83 + 569 + 0 + 2 = 666.

668356902 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 253008 + ... + 255635.

It is an arithmetic number, because the mean of its divisors is an integer number (61164441).

Almost surely, 2^668356902 is an apocalyptic number.

668356902 is an abundant number, since it is smaller than the sum of its proper divisors (799589682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668356902 is a wasteful number, since it uses less digits than its factorization.

668356902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508724 (or 508721 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 668356902 is about 25852.5995211313. The cubic root of 668356902 is about 874.3181199656.

It can be divided in two parts, 66835 and 6902, that added together give a palindrome (73737).

The spelling of 668356902 in words is "six hundred sixty-eight million, three hundred fifty-six thousand, nine hundred two".