72506517600660 has 96 divisors (see below), whose sum is σ = 238510950233472. Its totient is φ = 16225234705920.

The previous prime is 72506517600617. The next prime is 72506517600661. The reversal of 72506517600660 is 6600671560527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72506517600661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4225312959 + ... + 4225330118.

It is an arithmetic number, because the mean of its divisors is an integer number (2484489064932).

Almost surely, 2^{72506517600660} is an apocalyptic number.

It is an amenable number.

72506517600660 is an abundant number, since it is smaller than the sum of its proper divisors (166004432632812).

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

72506517600660 is a wasteful number, since it uses less digits than its factorization.

72506517600660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8450643113 (or 8450643111 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 72506517600660 in words is "seventy-two trillion, five hundred six billion, five hundred seventeen million, six hundred thousand, six hundred sixty".