86665806 has 24 divisors (see below), whose sum is σ = 187947864. Its totient is φ = 28862160.

The previous prime is 86665781. The next prime is 86665829. The reversal of 86665806 is 60856668.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 34741 + ... + 37151.

It is an arithmetic number, because the mean of its divisors is an integer number (7831161).

Almost surely, 2^86665806 is an apocalyptic number.

86665806 is an abundant number, since it is smaller than the sum of its proper divisors (101282058).

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

86665806 is a wasteful number, since it uses less digits than its factorization.

86665806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4416 (or 4413 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 86665806 is about 9309.4471371827. The cubic root of 86665806 is about 442.5366665011.

The spelling of 86665806 in words is "eighty-six million, six hundred sixty-five thousand, eight hundred six".