665052636 has 48 divisors (see below), whose sum is σ = 1658780928. Its totient is φ = 206870400.

The previous prime is 665052629. The next prime is 665052673. The reversal of 665052636 is 636250566.

It is a junction number, because it is equal to n+sod(n) for n = 665052594 and 665052603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18070 + ... + 40701.

It is an arithmetic number, because the mean of its divisors is an integer number (34557936).

Almost surely, 2^665052636 is an apocalyptic number.

It is an amenable number.

665052636 is an abundant number, since it is smaller than the sum of its proper divisors (993728292).

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

665052636 is a wasteful number, since it uses less digits than its factorization.

665052636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58842 (or 58840 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 39.

The square root of 665052636 is about 25788.6144645268. The cubic root of 665052636 is about 872.8749021999.

The spelling of 665052636 in words is "six hundred sixty-five million, fifty-two thousand, six hundred thirty-six".