668913932 has 12 divisors (see below), whose sum is σ = 1184703576. Its totient is φ = 330427200.

The previous prime is 668913929. The next prime is 668913941. The reversal of 668913932 is 239319866.

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, 1007069 + ... + 1007732.

It is an arithmetic number, because the mean of its divisors is an integer number (98725298).

Almost surely, 2^668913932 is an apocalyptic number.

It is an amenable number.

668913932 is a deficient number, since it is larger than the sum of its proper divisors (515789644).

668913932 is a wasteful number, since it uses less digits than its factorization.

668913932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014888 (or 2014886 counting only the distinct ones).

The product of its digits is 419904, while the sum is 47.

The square root of 668913932 is about 25863.3704686764. The cubic root of 668913932 is about 874.5609474050.

The spelling of 668913932 in words is "six hundred sixty-eight million, nine hundred thirteen thousand, nine hundred thirty-two".