866588085793 has 4 divisors (see below), whose sum is σ = 867190302720. Its totient is φ = 865985868868.

The previous prime is 866588085791. The next prime is 866588085817. The reversal of 866588085793 is 397580885668.

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 866588085793 - 2¹ = 866588085791 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866588085791) 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, 301106305 + ... + 301109182.

It is an arithmetic number, because the mean of its divisors is an integer number (216797575680).

Almost surely, 2^866588085793 is an apocalyptic number.

It is an amenable number.

866588085793 is a deficient number, since it is larger than the sum of its proper divisors (602216927).

866588085793 is a wasteful number, since it uses less digits than its factorization.

866588085793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602216926.

The product of its (nonzero) digits is 696729600, while the sum is 73.

The spelling of 866588085793 in words is "eight hundred sixty-six billion, five hundred eighty-eight million, eighty-five thousand, seven hundred ninety-three".