86665218 has 32 divisors (see below), whose sum is σ = 186649920. Its totient is φ = 26726400.

The previous prime is 86665217. The next prime is 86665223. The reversal of 86665218 is 81256668.

It is a self number, because there is not a number n which added to its sum of digits gives 86665218.

It is not an unprimeable number, because it can be changed into a prime (86665217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1183 + ... + 13218.

It is an arithmetic number, because the mean of its divisors is an integer number (5832810).

Almost surely, 2^86665218 is an apocalyptic number.

86665218 is an abundant number, since it is smaller than the sum of its proper divisors (99984702).

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

86665218 is a wasteful number, since it uses less digits than its factorization.

86665218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14482.

The product of its digits is 138240, while the sum is 42.

The square root of 86665218 is about 9309.4155563064. The cubic root of 86665218 is about 442.5356656752.

The spelling of 86665218 in words is "eighty-six million, six hundred sixty-five thousand, two hundred eighteen".