866800082636875 has 20 divisors (see below), whose sum is σ = 1098409064773680. Its totient is φ = 683673304580000.

The previous prime is 866800082636861. The next prime is 866800082636879. The reversal of 866800082636875 is 578636280008668.

It is a happy number.

It is not a de Polignac number, because 866800082636875 - 2³⁵ = 866765722898507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 866800082636798 and 866800082636807.

It is not an unprimeable number, because it can be changed into a prime (866800082636879) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9766717120 + ... + 9766805869.

It is an arithmetic number, because the mean of its divisors is an integer number (54920453238684).

Almost surely, 2^{866800082636875} is an apocalyptic number.

866800082636875 is a deficient number, since it is larger than the sum of its proper divisors (231608982136805).

866800082636875 is an equidigital number, since it uses as much as digits as its factorization.

866800082636875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19533523080 (or 19533523065 counting only the distinct ones).

The product of its (nonzero) digits is 1114767360, while the sum is 73.

The spelling of 866800082636875 in words is "eight hundred sixty-six trillion, eight hundred billion, eighty-two million, six hundred thirty-six thousand, eight hundred seventy-five".