665715583234236 has 48 divisors (see below), whose sum is σ = 1587101160355200. Its totient is φ = 217126108246080.

The previous prime is 665715583234211. The next prime is 665715583234249. The reversal of 665715583234236 is 632432385517566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2778418650 + ... + 2778658241.

It is an arithmetic number, because the mean of its divisors is an integer number (33064607507400).

Almost surely, 2^{665715583234236} is an apocalyptic number.

It is an amenable number.

665715583234236 is an abundant number, since it is smaller than the sum of its proper divisors (921385577120964).

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

665715583234236 is a wasteful number, since it uses less digits than its factorization.

665715583234236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5557077114 (or 5557077112 counting only the distinct ones).

The product of its digits is 653184000, while the sum is 66.

The spelling of 665715583234236 in words is "six hundred sixty-five trillion, seven hundred fifteen billion, five hundred eighty-three million, two hundred thirty-four thousand, two hundred thirty-six".