667072732 has 24 divisors (see below), whose sum is σ = 1213803360. Its totient is φ = 320389440.

The previous prime is 667072727. The next prime is 667072753. The reversal of 667072732 is 237270766.

It is a happy number.

It is a congruent number.

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, 8257 + ... + 37447.

It is an arithmetic number, because the mean of its divisors is an integer number (50575140).

Almost surely, 2^667072732 is an apocalyptic number.

It is an amenable number.

667072732 is a deficient number, since it is larger than the sum of its proper divisors (546730628).

667072732 is a wasteful number, since it uses less digits than its factorization.

667072732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29421 (or 29419 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 40.

The square root of 667072732 is about 25827.7511990494. The cubic root of 667072732 is about 873.7577941088.

The spelling of 667072732 in words is "six hundred sixty-seven million, seventy-two thousand, seven hundred thirty-two".