82057566 has 16 divisors (see below), whose sum is σ = 166806288. Its totient is φ = 26904000.

The previous prime is 82057553. The next prime is 82057567. The reversal of 82057566 is 66575028.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82057567) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 111735 + ... + 112466.

It is an arithmetic number, because the mean of its divisors is an integer number (10425393).

Almost surely, 2^82057566 is an apocalyptic number.

82057566 is an abundant number, since it is smaller than the sum of its proper divisors (84748722).

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

82057566 is a wasteful number, since it uses less digits than its factorization.

82057566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224267.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 82057566 is about 9058.5631310931. The cubic root of 82057566 is about 434.5497891947.

The spelling of 82057566 in words is "eighty-two million, fifty-seven thousand, five hundred sixty-six".