866786517366636 has 96 divisors (see below), whose sum is σ = 2066917232959488. Its totient is φ = 282656526497280.

The previous prime is 866786517366589. The next prime is 866786517366641. The reversal of 866786517366636 is 636663715687668.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53590195 + ... + 67863701.

It is an arithmetic number, because the mean of its divisors is an integer number (21530387843328).

Almost surely, 2^{866786517366636} is an apocalyptic number.

It is an amenable number.

866786517366636 is an abundant number, since it is smaller than the sum of its proper divisors (1200130715592852).

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

866786517366636 is a wasteful number, since it uses less digits than its factorization.

866786517366636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14274151 (or 14274149 counting only the distinct ones).

The product of its digits is 39504568320, while the sum is 84.

The spelling of 866786517366636 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, five hundred seventeen million, three hundred sixty-six thousand, six hundred thirty-six".