866786517366793 has 16 divisors (see below), whose sum is σ = 894007020830976. Its totient is φ = 840104142958080.

The previous prime is 866786517366779. The next prime is 866786517366811. The reversal of 866786517366793 is 397663715687668.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866786517366793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866786517366733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 431577696 + ... + 433581457.

It is an arithmetic number, because the mean of its divisors is an integer number (55875438801936).

Almost surely, 2^{866786517366793} is an apocalyptic number.

It is an amenable number.

866786517366793 is a deficient number, since it is larger than the sum of its proper divisors (27220503464183).

866786517366793 is a wasteful number, since it uses less digits than its factorization.

866786517366793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865159464.

The product of its digits is 69132994560, while the sum is 88.

The spelling of 866786517366793 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, five hundred seventeen million, three hundred sixty-six thousand, seven hundred ninety-three".