866788805167736 has 16 divisors (see below), whose sum is σ = 1772977101479640. Its totient is φ = 393994911439840.

The previous prime is 866788805167711. The next prime is 866788805167759. The reversal of 866788805167736 is 637761508887668.

It is a super-2 number, since 2×866788805167736² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4924936392911 + ... + 4924936393086.

Almost surely, 2^{866788805167736} is an apocalyptic number.

It is an amenable number.

866788805167736 is an abundant number, since it is smaller than the sum of its proper divisors (906188296311904).

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

866788805167736 is a wasteful number, since it uses less digits than its factorization.

866788805167736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9849872786014 (or 9849872786010 counting only the distinct ones).

The product of its (nonzero) digits is 27311800320, while the sum is 86.

The spelling of 866788805167736 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, eight hundred five million, one hundred sixty-seven thousand, seven hundred thirty-six".