866788810278852 has 48 divisors (see below), whose sum is σ = 2155345348810752. Its totient is φ = 270487288309920.

The previous prime is 866788810278673. The next prime is 866788810278863. The reversal of 866788810278852 is 258872018887668.

It is a Smith number, since the sum of its digits (84) 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, 33409978174 + ... + 33410004117.

It is an arithmetic number, because the mean of its divisors is an integer number (44903028100224).

Almost surely, 2^{866788810278852} is an apocalyptic number.

It is an amenable number.

866788810278852 is an abundant number, since it is smaller than the sum of its proper divisors (1288556538531900).

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

866788810278852 is a wasteful number, since it uses less digits than its factorization.

866788810278852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66819982368 (or 66819982366 counting only the distinct ones).

The product of its (nonzero) digits is 9248440320, while the sum is 84.

The spelling of 866788810278852 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, eight hundred ten million, two hundred seventy-eight thousand, eight hundred fifty-two".