866788805170320 has 80 divisors (see below), whose sum is σ = 2687124934937472. Its totient is φ = 231136830720000.

The previous prime is 866788805170319. The next prime is 866788805170411. The reversal of 866788805170320 is 23071508887668.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Smith number, since the sum of its digits (69) 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, 45403657 + ... + 61604136.

Almost surely, 2^{866788805170320} is an apocalyptic number.

866788805170320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

866788805170320 is an abundant number, since it is smaller than the sum of its proper divisors (1820336129767152).

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

866788805170320 is a wasteful number, since it uses less digits than its factorization.

866788805170320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107041560 (or 107041554 counting only the distinct ones).

The product of its (nonzero) digits is 216760320, while the sum is 69.

The spelling of 866788805170320 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, eight hundred five million, one hundred seventy thousand, three hundred twenty".