82566915 has 32 divisors (see below), whose sum is σ = 137306880. Its totient is φ = 42317184.

The previous prime is 82566893. The next prime is 82566949. The reversal of 82566915 is 51966528.

It is not a de Polignac number, because 82566915 - 2⁶ = 82566851 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150672 + ... + 151218.

It is an arithmetic number, because the mean of its divisors is an integer number (4290840).

Almost surely, 2^82566915 is an apocalyptic number.

82566915 is a deficient number, since it is larger than the sum of its proper divisors (54739965).

82566915 is a wasteful number, since it uses less digits than its factorization.

82566915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931.

The product of its digits is 129600, while the sum is 42.

The square root of 82566915 is about 9086.6338651890. The cubic root of 82566915 is about 435.4470499874.

The spelling of 82566915 in words is "eighty-two million, five hundred sixty-six thousand, nine hundred fifteen".