668108604 has 12 divisors (see below), whose sum is σ = 1558920104. Its totient is φ = 222702864.

The previous prime is 668108599. The next prime is 668108659. The reversal of 668108604 is 406801866.

It is a tau number, because it is divible by the number of its divisors (12).

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, 27837847 + ... + 27837870.

Almost surely, 2^668108604 is an apocalyptic number.

It is an amenable number.

668108604 is an abundant number, since it is smaller than the sum of its proper divisors (890811500).

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

668108604 is a wasteful number, since it uses less digits than its factorization.

668108604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55675724 (or 55675722 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 668108604 is about 25847.7968887099. The cubic root of 668108604 is about 874.2098353406.

The spelling of 668108604 in words is "six hundred sixty-eight million, one hundred eight thousand, six hundred four".