72115566 has 8 divisors (see below), whose sum is σ = 144231144. Its totient is φ = 24038520.

The previous prime is 72115529. The next prime is 72115591. The reversal of 72115566 is 66551127.

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

72115566 is an admirable number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 6009625 + ... + 6009636.

It is an arithmetic number, because the mean of its divisors is an integer number (18028893).

Almost surely, 2^72115566 is an apocalyptic number.

72115566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

72115566 is a wasteful number, since it uses less digits than its factorization.

72115566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12019266.

The product of its digits is 12600, while the sum is 33.

The square root of 72115566 is about 8492.0884357147. The cubic root of 72115566 is about 416.2392261548.

The spelling of 72115566 in words is "seventy-two million, one hundred fifteen thousand, five hundred sixty-six".