866802655354440 has 128 divisors (see below), whose sum is σ = 3074373950112000. Its totient is φ = 191294379107328.

The previous prime is 866802655354423. The next prime is 866802655354453. The reversal of 866802655354440 is 44453556208668.

It is a super-5 number, since 5×866802655354440⁵ (a number of 76 digits) contains 55555 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17791491555 + ... + 17791540274.

It is an arithmetic number, because the mean of its divisors is an integer number (24018546485250).

Almost surely, 2^{866802655354440} is an apocalyptic number.

It is an amenable number.

866802655354440 is an abundant number, since it is smaller than the sum of its proper divisors (2207571294757560).

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

866802655354440 is a wasteful number, since it uses less digits than its factorization.

866802655354440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35583031879 (or 35583031875 counting only the distinct ones).

The product of its (nonzero) digits is 663552000, while the sum is 66.

The spelling of 866802655354440 in words is "eight hundred sixty-six trillion, eight hundred two billion, six hundred fifty-five million, three hundred fifty-four thousand, four hundred forty".