668744924 has 6 divisors (see below), whose sum is σ = 1170303624. Its totient is φ = 334372460.

The previous prime is 668744917. The next prime is 668744939. The reversal of 668744924 is 429447866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83593112 + ... + 83593119.

It is an arithmetic number, because the mean of its divisors is an integer number (195050604).

Almost surely, 2^668744924 is an apocalyptic number.

It is an amenable number.

668744924 is a deficient number, since it is larger than the sum of its proper divisors (501558700).

668744924 is a wasteful number, since it uses less digits than its factorization.

668744924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167186235 (or 167186233 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 50.

The square root of 668744924 is about 25860.1029386969. The cubic root of 668744924 is about 874.4872855881.

The spelling of 668744924 in words is "six hundred sixty-eight million, seven hundred forty-four thousand, nine hundred twenty-four".