866802166204745 has 16 divisors (see below), whose sum is σ = 1094908788858240. Its totient is φ = 656944325985024.

The previous prime is 866802166204739. The next prime is 866802166204771. The reversal of 866802166204745 is 547402661208668.

It is a cyclic number.

It is not a de Polignac number, because 866802166204745 - 2⁴ = 866802166204729 is a prime.

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, 186489884 + ... + 191081346.

It is an arithmetic number, because the mean of its divisors is an integer number (68431799303640).

Almost surely, 2^{866802166204745} is an apocalyptic number.

It is an amenable number.

866802166204745 is a deficient number, since it is larger than the sum of its proper divisors (228106622653495).

866802166204745 is a wasteful number, since it uses less digits than its factorization.

866802166204745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6578704.

The product of its (nonzero) digits is 185794560, while the sum is 65.

The spelling of 866802166204745 in words is "eight hundred sixty-six trillion, eight hundred two billion, one hundred sixty-six million, two hundred four thousand, seven hundred forty-five".