866882868863 has 4 divisors (see below), whose sum is σ = 945690402408. Its totient is φ = 788075335320.

The previous prime is 866882868857. The next prime is 866882868871. The reversal of 866882868863 is 368868288668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 866882868863 - 2³⁰ = 865809127039 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 (866882868823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39403766756 + ... + 39403766777.

It is an arithmetic number, because the mean of its divisors is an integer number (236422600602).

Almost surely, 2^866882868863 is an apocalyptic number.

866882868863 is a deficient number, since it is larger than the sum of its proper divisors (78807533545).

866882868863 is a wasteful number, since it uses less digits than its factorization.

866882868863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78807533544.

The product of its digits is 2038431744, while the sum is 77.

The spelling of 866882868863 in words is "eight hundred sixty-six billion, eight hundred eighty-two million, eight hundred sixty-eight thousand, eight hundred sixty-three".