665224536 has 32 divisors (see below), whose sum is σ = 1716710400. Its totient is φ = 214588320.

The previous prime is 665224529. The next prime is 665224597. The reversal of 665224536 is 635422566.

It is a junction number, because it is equal to n+sod(n) for n = 665224494 and 665224503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446316 + ... + 447803.

It is an arithmetic number, because the mean of its divisors is an integer number (53647200).

Almost surely, 2^665224536 is an apocalyptic number.

It is an amenable number.

665224536 is an abundant number, since it is smaller than the sum of its proper divisors (1051485864).

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

665224536 is a wasteful number, since it uses less digits than its factorization.

665224536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894159 (or 894155 counting only the distinct ones).

The product of its digits is 259200, while the sum is 39.

The square root of 665224536 is about 25791.9471153304. The cubic root of 665224536 is about 872.9501013954.

The spelling of 665224536 in words is "six hundred sixty-five million, two hundred twenty-four thousand, five hundred thirty-six".