72665286 has 16 divisors (see below), whose sum is σ = 146665200. Its totient is φ = 23999328.

The previous prime is 72665273. The next prime is 72665309. The reversal of 72665286 is 68256627.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54901 + ... + 56208.

It is an arithmetic number, because the mean of its divisors is an integer number (9166575).

Almost surely, 2^72665286 is an apocalyptic number.

72665286 is an abundant number, since it is smaller than the sum of its proper divisors (73999914).

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

72665286 is a wasteful number, since it uses less digits than its factorization.

72665286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111223.

The product of its digits is 241920, while the sum is 42.

The square root of 72665286 is about 8524.3935854699. The cubic root of 72665286 is about 417.2941813641.

The spelling of 72665286 in words is "seventy-two million, six hundred sixty-five thousand, two hundred eighty-six".