668984196 has 24 divisors (see below), whose sum is σ = 1597265824. Its totient is φ = 217808640.

The previous prime is 668984177. The next prime is 668984207. The reversal of 668984196 is 691489866.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647725 + ... + 648756.

Almost surely, 2^668984196 is an apocalyptic number.

It is an amenable number.

668984196 is an abundant number, since it is smaller than the sum of its proper divisors (928281628).

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

668984196 is a wasteful number, since it uses less digits than its factorization.

668984196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296531 (or 1296529 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 57.

The square root of 668984196 is about 25864.7288019805. The cubic root of 668984196 is about 874.5915681849.

The spelling of 668984196 in words is "six hundred sixty-eight million, nine hundred eighty-four thousand, one hundred ninety-six".