665330672 has 30 divisors (see below), whose sum is σ = 1299401208. Its totient is φ = 330010656.

The previous prime is 665330639. The next prime is 665330689. The reversal of 665330672 is 276033566.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1333079 + ... + 1333577.

Almost surely, 2^665330672 is an apocalyptic number.

It is an amenable number.

665330672 is a deficient number, since it is larger than the sum of its proper divisors (634070536).

665330672 is an equidigital number, since it uses as much as digits as its factorization.

665330672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 38.

The square root of 665330672 is about 25794.0045747069. The cubic root of 665330672 is about 872.9965250714.

The spelling of 665330672 in words is "six hundred sixty-five million, three hundred thirty thousand, six hundred seventy-two".