866800117272650 has 96 divisors (see below), whose sum is σ = 1835415746016768. Its totient is φ = 301474462308800.

The previous prime is 866800117272647. The next prime is 866800117272667. The reversal of 866800117272650 is 56272711008668.

It is a self number, because there is not a number n which added to its sum of digits gives 866800117272650.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 177768497 + ... + 182579403.

It is an arithmetic number, because the mean of its divisors is an integer number (19118914021008).

Almost surely, 2^{866800117272650} is an apocalyptic number.

866800117272650 is an abundant number, since it is smaller than the sum of its proper divisors (968615628744118).

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

866800117272650 is a wasteful number, since it uses less digits than its factorization.

866800117272650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4825196 (or 4825191 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 59.

The spelling of 866800117272650 in words is "eight hundred sixty-six trillion, eight hundred billion, one hundred seventeen million, two hundred seventy-two thousand, six hundred fifty".