866788517312164 has 48 divisors (see below), whose sum is σ = 1607766977844720. Its totient is φ = 407479254773760.

The previous prime is 866788517312141. The next prime is 866788517312171. The reversal of 866788517312164 is 461213715887668.

It can be written as a sum of positive squares in 8 ways, for example, as 33030399795264 + 833758117516900 = 5747208^2 + 28874870^2 .

It is a Smith number, since the sum of its digits (73) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 807304672 + ... + 808377640.

It is an arithmetic number, because the mean of its divisors is an integer number (33495145371765).

Almost surely, 2^{866788517312164} is an apocalyptic number.

It is an amenable number.

866788517312164 is a deficient number, since it is larger than the sum of its proper divisors (740978460532556).

866788517312164 is a wasteful number, since it uses less digits than its factorization.

866788517312164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085248 (or 1085246 counting only the distinct ones).

The product of its digits is 650280960, while the sum is 73.

The spelling of 866788517312164 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred seventeen million, three hundred twelve thousand, one hundred sixty-four".