866743826832 has 160 divisors (see below), whose sum is σ = 2712329455360. Its totient is φ = 266690268288.

The previous prime is 866743826827. The next prime is 866743826857. The reversal of 866743826832 is 238628347668.

It is a happy number.

866743826832 is a `hidden beast` number, since 86 + 67 + 438 + 2 + 68 + 3 + 2 = 666.

It is a super-2 number, since 2×866743826832² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 866743826832.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 497788 + ... + 1407579.

It is an arithmetic number, because the mean of its divisors is an integer number (16952059096).

Almost surely, 2^866743826832 is an apocalyptic number.

It is an amenable number.

866743826832 is an abundant number, since it is smaller than the sum of its proper divisors (1845585628528).

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

866743826832 is a wasteful number, since it uses less digits than its factorization.

866743826832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1905409 (or 1905385 counting only the distinct ones).

The product of its digits is 111476736, while the sum is 63.

The spelling of 866743826832 in words is "eight hundred sixty-six billion, seven hundred forty-three million, eight hundred twenty-six thousand, eight hundred thirty-two".