866188164 has 24 divisors (see below), whose sum is σ = 2032793280. Its totient is φ = 287059744.

The previous prime is 866188159. The next prime is 866188171. The reversal of 866188164 is 461881668.

866188164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206544 + ... + 210695.

It is an arithmetic number, because the mean of its divisors is an integer number (84699720).

Almost surely, 2^866188164 is an apocalyptic number.

It is an amenable number.

866188164 is an abundant number, since it is smaller than the sum of its proper divisors (1166605116).

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

866188164 is a wasteful number, since it uses less digits than its factorization.

866188164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417419 (or 417417 counting only the distinct ones).

The product of its digits is 442368, while the sum is 48.

The square root of 866188164 is about 29431.0748019844. The cubic root of 866188164 is about 953.2440028555.

The spelling of 866188164 in words is "eight hundred sixty-six million, one hundred eighty-eight thousand, one hundred sixty-four".