866788526376872 has 64 divisors (see below), whose sum is σ = 1773296807385600. Its totient is φ = 393923618504640.

The previous prime is 866788526376833. The next prime is 866788526376907. The reversal of 866788526376872 is 278673625887668.

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, 21603263003 + ... + 21603303125.

It is an arithmetic number, because the mean of its divisors is an integer number (27707762615400).

Almost surely, 2^{866788526376872} is an apocalyptic number.

It is an amenable number.

866788526376872 is an abundant number, since it is smaller than the sum of its proper divisors (906508281008728).

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

866788526376872 is a wasteful number, since it uses less digits than its factorization.

866788526376872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78366 (or 78362 counting only the distinct ones).

The product of its digits is 109247201280, while the sum is 89.

The spelling of 866788526376872 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred twenty-six million, three hundred seventy-six thousand, eight hundred seventy-two".