866164955 has 16 divisors (see below), whose sum is σ = 1093181184. Its totient is φ = 657920640.

The previous prime is 866164939. The next prime is 866164967. The reversal of 866164955 is 559461668.

It is a happy number.

It is not a de Polignac number, because 866164955 - 2⁴ = 866164939 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44504 + ... + 60933.

It is an arithmetic number, because the mean of its divisors is an integer number (68323824).

Almost surely, 2^866164955 is an apocalyptic number.

866164955 is a deficient number, since it is larger than the sum of its proper divisors (227016229).

866164955 is a wasteful number, since it uses less digits than its factorization.

866164955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105526.

The product of its digits is 1555200, while the sum is 50.

The square root of 866164955 is about 29430.6805052143. The cubic root of 866164955 is about 953.2354889095.

The spelling of 866164955 in words is "eight hundred sixty-six million, one hundred sixty-four thousand, nine hundred fifty-five".