86665444 has 12 divisors (see below), whose sum is σ = 151732224. Its totient is φ = 43313384.

The previous prime is 86665417. The next prime is 86665451. The reversal of 86665444 is 44456668.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 86665444.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11037 + ... + 17179.

It is an arithmetic number, because the mean of its divisors is an integer number (12644352).

Almost surely, 2^86665444 is an apocalyptic number.

It is an amenable number.

86665444 is a deficient number, since it is larger than the sum of its proper divisors (65066780).

86665444 is a wasteful number, since it uses less digits than its factorization.

86665444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9674 (or 9672 counting only the distinct ones).

The product of its digits is 552960, while the sum is 43.

The square root of 86665444 is about 9309.4276945471. The cubic root of 86665444 is about 442.5360503469.

The spelling of 86665444 in words is "eighty-six million, six hundred sixty-five thousand, four hundred forty-four".