86542566 has 16 divisors (see below), whose sum is σ = 188820288. Its totient is φ = 26225000.

The previous prime is 86542559. The next prime is 86542567. The reversal of 86542566 is 66524568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86542567) by changing a digit.

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, 655560 + ... + 655691.

It is an arithmetic number, because the mean of its divisors is an integer number (11801268).

Almost surely, 2^86542566 is an apocalyptic number.

86542566 is an abundant number, since it is smaller than the sum of its proper divisors (102277722).

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

86542566 is a wasteful number, since it uses less digits than its factorization.

86542566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311267.

The product of its digits is 345600, while the sum is 42.

The square root of 86542566 is about 9302.8256997538. The cubic root of 86542566 is about 442.3268025300.

The spelling of 86542566 in words is "eighty-six million, five hundred forty-two thousand, five hundred sixty-six".