665631032 has 16 divisors (see below), whose sum is σ = 1361518200. Its totient is φ = 302559520.

The previous prime is 665630993. The next prime is 665631067. The reversal of 665631032 is 230136566.

It is a super-2 number, since 2×665631032² = 886129341522770048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 665631032.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3781907 + ... + 3782082.

Almost surely, 2^665631032 is an apocalyptic number.

It is an amenable number.

665631032 is an abundant number, since it is smaller than the sum of its proper divisors (695887168).

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

665631032 is a wasteful number, since it uses less digits than its factorization.

665631032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7564006 (or 7564002 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 665631032 is about 25799.8262009650. The cubic root of 665631032 is about 873.1278751899.

Adding to 665631032 its reverse (230136566), we get a palindrome (895767598).

The spelling of 665631032 in words is "six hundred sixty-five million, six hundred thirty-one thousand, thirty-two".