667831432 has 8 divisors (see below), whose sum is σ = 1252183950. Its totient is φ = 333915712.

The previous prime is 667831403. The next prime is 667831447. The reversal of 667831432 is 234138766.

It can be written as a sum of positive squares in only one way, i.e., 633327556 + 34503876 = 25166^2 + 5874^2 .

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, 41739457 + ... + 41739472.

Almost surely, 2^667831432 is an apocalyptic number.

It is an amenable number.

667831432 is a deficient number, since it is larger than the sum of its proper divisors (584352518).

667831432 is a wasteful number, since it uses less digits than its factorization.

667831432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83478935 (or 83478931 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 667831432 is about 25842.4347150186. The cubic root of 667831432 is about 874.0889268522.

The spelling of 667831432 in words is "six hundred sixty-seven million, eight hundred thirty-one thousand, four hundred thirty-two".