72665975553 has 8 divisors (see below), whose sum is σ = 97482372768. Its totient is φ = 48146781024.

The previous prime is 72665975549. The next prime is 72665975563. The reversal of 72665975553 is 35557956627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72665975553 - 2² = 72665975549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72665975563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74300100 + ... + 74301077.

It is an arithmetic number, because the mean of its divisors is an integer number (12185296596).

Almost surely, 2^72665975553 is an apocalyptic number.

It is an amenable number.

72665975553 is a deficient number, since it is larger than the sum of its proper divisors (24816397215).

72665975553 is a wasteful number, since it uses less digits than its factorization.

72665975553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148601343.

The product of its digits is 59535000, while the sum is 60.

The spelling of 72665975553 in words is "seventy-two billion, six hundred sixty-five million, nine hundred seventy-five thousand, five hundred fifty-three".