866511718722057 has 16 divisors (see below), whose sum is σ = 1162030696686720. Its totient is φ = 574333629612672.

The previous prime is 866511718722049. The next prime is 866511718722101. The reversal of 866511718722057 is 750227817115668.

It is not a de Polignac number, because 866511718722057 - 2³ = 866511718722049 is a prime.

It is a super-2 number, since 2×866511718722057² (a number of 31 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (866511718722047) 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, 188265069 + ... + 192812757.

It is an arithmetic number, because the mean of its divisors is an integer number (72626918542920).

Almost surely, 2^{866511718722057} is an apocalyptic number.

It is an amenable number.

866511718722057 is a deficient number, since it is larger than the sum of its proper divisors (295518977964663).

866511718722057 is a wasteful number, since it uses less digits than its factorization.

866511718722057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4914992.

The product of its (nonzero) digits is 79027200, while the sum is 66.

The spelling of 866511718722057 in words is "eight hundred sixty-six trillion, five hundred eleven billion, seven hundred eighteen million, seven hundred twenty-two thousand, fifty-seven".