72665995 has 16 divisors (see below), whose sum is σ = 89400960. Its totient is φ = 56674944.

The previous prime is 72665987. The next prime is 72666019. The reversal of 72665995 is 59956627.

It is a cyclic number.

It is not a de Polignac number, because 72665995 - 2³ = 72665987 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87241 + ... + 88069.

It is an arithmetic number, because the mean of its divisors is an integer number (5587560).

Almost surely, 2^72665995 is an apocalyptic number.

72665995 is a deficient number, since it is larger than the sum of its proper divisors (16734965).

72665995 is a wasteful number, since it uses less digits than its factorization.

72665995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254.

The product of its digits is 1020600, while the sum is 49.

The square root of 72665995 is about 8524.4351719044. The cubic root of 72665995 is about 417.2955385486.

The spelling of 72665995 in words is "seventy-two million, six hundred sixty-five thousand, nine hundred ninety-five".