866802655166185 has 16 divisors (see below), whose sum is σ = 1075878000812160. Its totient is φ = 669960659813760.

The previous prime is 866802655166177. The next prime is 866802655166257. The reversal of 866802655166185 is 581661556208668.

It is not a de Polignac number, because 866802655166185 - 2³ = 866802655166177 is a prime.

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, 20525734395 + ... + 20525776624.

It is an arithmetic number, because the mean of its divisors is an integer number (67242375050760).

Almost surely, 2^{866802655166185} is an apocalyptic number.

It is an amenable number.

866802655166185 is a deficient number, since it is larger than the sum of its proper divisors (209075345645975).

866802655166185 is a wasteful number, since it uses less digits than its factorization.

866802655166185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41051511168.

The product of its (nonzero) digits is 995328000, while the sum is 73.

The spelling of 866802655166185 in words is "eight hundred sixty-six trillion, eight hundred two billion, six hundred fifty-five million, one hundred sixty-six thousand, one hundred eighty-five".