668610432 has 96 divisors (see below), whose sum is σ = 2198879280. Its totient is φ = 191029248.

The previous prime is 668610421. The next prime is 668610443. The reversal of 668610432 is 234016866.

668610432 is a `hidden beast` number, since 6 + 6 + 8 + 610 + 4 + 32 = 666.

668610432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (668610421) and next prime (668610443).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33393 + ... + 49520.

Almost surely, 2^668610432 is an apocalyptic number.

It is an amenable number.

668610432 is an abundant number, since it is smaller than the sum of its proper divisors (1530268848).

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

668610432 is a wasteful number, since it uses less digits than its factorization.

668610432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82940 (or 82925 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 668610432 is about 25857.5024315961. The cubic root of 668610432 is about 874.4286586363.

The spelling of 668610432 in words is "six hundred sixty-eight million, six hundred ten thousand, four hundred thirty-two".