72766218 has 16 divisors (see below), whose sum is σ = 166322880. Its totient is φ = 20790336.

The previous prime is 72766193. The next prime is 72766223. The reversal of 72766218 is 81266727.

It is a Curzon 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, 866223 + ... + 866306.

It is an arithmetic number, because the mean of its divisors is an integer number (10395180).

Almost surely, 2^72766218 is an apocalyptic number.

72766218 is an abundant number, since it is smaller than the sum of its proper divisors (93556662).

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

72766218 is a wasteful number, since it uses less digits than its factorization.

72766218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732541.

The product of its digits is 56448, while the sum is 39.

The square root of 72766218 is about 8530.3117176338. The cubic root of 72766218 is about 417.4872990268.

The spelling of 72766218 in words is "seventy-two million, seven hundred sixty-six thousand, two hundred eighteen".