866786517366882 has 16 divisors (see below), whose sum is σ = 1981226325410112. Its totient is φ = 247653290676240.

The previous prime is 866786517366881. The next prime is 866786517366907. The reversal of 866786517366882 is 288663715687668.

866786517366882 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (866786517366881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10318887111469 + ... + 10318887111552.

It is an arithmetic number, because the mean of its divisors is an integer number (123826645338132).

Almost surely, 2^{866786517366882} is an apocalyptic number.

866786517366882 is an abundant number, since it is smaller than the sum of its proper divisors (1114439808043230).

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

866786517366882 is a wasteful number, since it uses less digits than its factorization.

866786517366882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20637774223033.

The product of its digits is 46820229120, while the sum is 87.

The spelling of 866786517366882 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, five hundred seventeen million, three hundred sixty-six thousand, eight hundred eighty-two".