72866787 has 16 divisors (see below), whose sum is σ = 111175680. Its totient is φ = 41585472.

The previous prime is 72866747. The next prime is 72866791. The reversal of 72866787 is 78766827.

It is not a de Polignac number, because 72866787 - 2⁶ = 72866723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72866707) 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 15 ways as a sum of consecutive naturals, for example, 20014 + ... + 23372.

It is an arithmetic number, because the mean of its divisors is an integer number (6948480).

Almost surely, 2^72866787 is an apocalyptic number.

72866787 is a deficient number, since it is larger than the sum of its proper divisors (38308893).

72866787 is a wasteful number, since it uses less digits than its factorization.

72866787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4402.

The product of its digits is 1580544, while the sum is 51.

The square root of 72866787 is about 8536.2044844298. The cubic root of 72866787 is about 417.6795446105.

The spelling of 72866787 in words is "seventy-two million, eight hundred sixty-six thousand, seven hundred eighty-seven".