668873404 has 6 divisors (see below), whose sum is σ = 1170528464. Its totient is φ = 334436700.

The previous prime is 668873389. The next prime is 668873407. The reversal of 668873404 is 404378866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668873407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83609172 + ... + 83609179.

Almost surely, 2^668873404 is an apocalyptic number.

It is an amenable number.

668873404 is a deficient number, since it is larger than the sum of its proper divisors (501655060).

668873404 is a wasteful number, since it uses less digits than its factorization.

668873404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167218355 (or 167218353 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 46.

The square root of 668873404 is about 25862.5869549046. The cubic root of 668873404 is about 874.5432844839.

The spelling of 668873404 in words is "six hundred sixty-eight million, eight hundred seventy-three thousand, four hundred four".