866776395813 has 8 divisors (see below), whose sum is σ = 1167144454176. Its totient is φ = 572129634000.

The previous prime is 866776395799. The next prime is 866776395841. The reversal of 866776395813 is 318593677668.

866776395813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 866776395813 - 2⁸ = 866776395557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866776395853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1430323783 + ... + 1430324388.

It is an arithmetic number, because the mean of its divisors is an integer number (145893056772).

Almost surely, 2^866776395813 is an apocalyptic number.

It is an amenable number.

866776395813 is a deficient number, since it is larger than the sum of its proper divisors (300368058363).

866776395813 is a wasteful number, since it uses less digits than its factorization.

866776395813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860648275.

The product of its digits is 274337280, while the sum is 69.

The spelling of 866776395813 in words is "eight hundred sixty-six billion, seven hundred seventy-six million, three hundred ninety-five thousand, eight hundred thirteen".