866860045711813 has 4 divisors (see below), whose sum is σ = 867961519722400. Its totient is φ = 865758571701228.

The previous prime is 866860045711799. The next prime is 866860045711859. The reversal of 866860045711813 is 318117540068668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 866860045711813 - 2⁹ = 866860045711301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866860045711873) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 550737004113 + ... + 550737005686.

It is an arithmetic number, because the mean of its divisors is an integer number (216990379930600).

Almost surely, 2^{866860045711813} is an apocalyptic number.

It is an amenable number.

866860045711813 is a deficient number, since it is larger than the sum of its proper divisors (1101474010587).

866860045711813 is a wasteful number, since it uses less digits than its factorization.

866860045711813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101474010586.

The product of its (nonzero) digits is 46448640, while the sum is 64.

The spelling of 866860045711813 in words is "eight hundred sixty-six trillion, eight hundred sixty billion, forty-five million, seven hundred eleven thousand, eight hundred thirteen".