82566631 has 8 divisors (see below), whose sum is σ = 94417280. Its totient is φ = 70729848.

The previous prime is 82566629. The next prime is 82566643. The reversal of 82566631 is 13666528.

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

It is not a de Polignac number, because 82566631 - 2¹ = 82566629 is a prime.

It is a super-2 number, since 2×82566631² = 13634497109380322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82566031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19180 + ... + 23086.

It is an arithmetic number, because the mean of its divisors is an integer number (11802160).

Almost surely, 2^82566631 is an apocalyptic number.

82566631 is a deficient number, since it is larger than the sum of its proper divisors (11850649).

82566631 is a wasteful number, since it uses less digits than its factorization.

82566631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6933.

The product of its digits is 51840, while the sum is 37.

The square root of 82566631 is about 9086.6182378264. The cubic root of 82566631 is about 435.4465507273.

The spelling of 82566631 in words is "eighty-two million, five hundred sixty-six thousand, six hundred thirty-one".