866673618252 has 96 divisors (see below), whose sum is σ = 2251182366720. Its totient is φ = 257706627840.

The previous prime is 866673618229. The next prime is 866673618277. The reversal of 866673618252 is 252816376668.

It is a super-2 number, since 2×866673618252² (a number of 25 digits) contains 22 as substring.

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, 3352458 + ... + 3601710.

It is an arithmetic number, because the mean of its divisors is an integer number (23449816320).

Almost surely, 2^866673618252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866673618252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1125591183360).

866673618252 is an abundant number, since it is smaller than the sum of its proper divisors (1384508748468).

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

866673618252 is a wasteful number, since it uses less digits than its factorization.

866673618252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250023 (or 250021 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 60.

The spelling of 866673618252 in words is "eight hundred sixty-six billion, six hundred seventy-three million, six hundred eighteen thousand, two hundred fifty-two".