665279232 has 72 divisors (see below), whose sum is σ = 1847645184. Its totient is φ = 212112384.

The previous prime is 665279171. The next prime is 665279239. The reversal of 665279232 is 232972566.

It is not an unprimeable number, because it can be changed into a prime (665279239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1168 + ... + 36495.

Almost surely, 2^665279232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665279232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (923822592).

665279232 is an abundant number, since it is smaller than the sum of its proper divisors (1182365952).

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

665279232 is a wasteful number, since it uses less digits than its factorization.

665279232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37705 (or 37691 counting only the distinct ones).

The product of its digits is 272160, while the sum is 42.

The square root of 665279232 is about 25793.0074244939. The cubic root of 665279232 is about 872.9740259340.

The spelling of 665279232 in words is "six hundred sixty-five million, two hundred seventy-nine thousand, two hundred thirty-two".