668126604 has 48 divisors (see below), whose sum is σ = 1598022272. Its totient is φ = 217147392.

The previous prime is 668126597. The next prime is 668126671. The reversal of 668126604 is 406621866.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 578892 + ... + 580044.

Almost surely, 2^668126604 is an apocalyptic number.

It is an amenable number.

668126604 is an abundant number, since it is smaller than the sum of its proper divisors (929895668).

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

668126604 is a wasteful number, since it uses less digits than its factorization.

668126604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326 (or 2324 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 668126604 is about 25848.1450785158. The cubic root of 668126604 is about 874.2176861778.

The spelling of 668126604 in words is "six hundred sixty-eight million, one hundred twenty-six thousand, six hundred four".