668402876 has 12 divisors (see below), whose sum is σ = 1175644008. Its totient is φ = 332504592.

The previous prime is 668402831. The next prime is 668402899. The reversal of 668402876 is 678204866.

It is a self number, because there is not a number n which added to its sum of digits gives 668402876.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423326 + ... + 424901.

It is an arithmetic number, because the mean of its divisors is an integer number (97970334).

Almost surely, 2^668402876 is an apocalyptic number.

It is an amenable number.

668402876 is a deficient number, since it is larger than the sum of its proper divisors (507241132).

668402876 is a wasteful number, since it uses less digits than its factorization.

668402876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848428 (or 848426 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 47.

The square root of 668402876 is about 25853.4886620742. The cubic root of 668402876 is about 874.3381666301.

The spelling of 668402876 in words is "six hundred sixty-eight million, four hundred two thousand, eight hundred seventy-six".