866802147274240 has 80 divisors (see below), whose sum is σ = 2078326604713392. Its totient is φ = 346715350401024.

The previous prime is 866802147274211. The next prime is 866802147274291. The reversal of 866802147274240 is 42472741208668.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160406467 + ... + 165722173.

Almost surely, 2^{866802147274240} is an apocalyptic number.

866802147274240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

866802147274240 is an abundant number, since it is smaller than the sum of its proper divisors (1211524457439152).

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

866802147274240 is an equidigital number, since it uses as much as digits as its factorization.

866802147274240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5379427 (or 5379411 counting only the distinct ones).

The product of its (nonzero) digits is 57802752, while the sum is 61.

The spelling of 866802147274240 in words is "eight hundred sixty-six trillion, eight hundred two billion, one hundred forty-seven million, two hundred seventy-four thousand, two hundred forty".