667555432 has 8 divisors (see below), whose sum is σ = 1251666450. Its totient is φ = 333777712.

The previous prime is 667555417. The next prime is 667555453. The reversal of 667555432 is 234555766.

It can be written as a sum of positive squares in only one way, i.e., 595067236 + 72488196 = 24394^2 + 8514^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41722207 + ... + 41722222.

Almost surely, 2^667555432 is an apocalyptic number.

It is an amenable number.

667555432 is a deficient number, since it is larger than the sum of its proper divisors (584111018).

667555432 is a wasteful number, since it uses less digits than its factorization.

667555432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83444435 (or 83444431 counting only the distinct ones).

The product of its digits is 756000, while the sum is 43.

The square root of 667555432 is about 25837.0941090518. The cubic root of 667555432 is about 873.9684963693.

The spelling of 667555432 in words is "six hundred sixty-seven million, five hundred fifty-five thousand, four hundred thirty-two".