866788526376673 has 32 divisors (see below), whose sum is σ = 953007638077440. Its totient is φ = 784699187690880.

The previous prime is 866788526376637. The next prime is 866788526376697. The reversal of 866788526376673 is 376673625887668.

It is a happy number.

It is not a de Polignac number, because 866788526376673 - 2²¹ = 866788524279521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866788526376613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2759112061 + ... + 2759426197.

It is an arithmetic number, because the mean of its divisors is an integer number (29781488689920).

Almost surely, 2^{866788526376673} is an apocalyptic number.

It is an amenable number.

866788526376673 is a deficient number, since it is larger than the sum of its proper divisors (86219111700767).

866788526376673 is a wasteful number, since it uses less digits than its factorization.

866788526376673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320317.

The product of its digits is 122903101440, while the sum is 88.

The spelling of 866788526376673 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred twenty-six million, three hundred seventy-six thousand, six hundred seventy-three".