866579975668 has 24 divisors (see below), whose sum is σ = 1654808541120. Its totient is φ = 393797944320.

The previous prime is 866579975621. The next prime is 866579975689.

866579975668 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 866579975591 and 866579975600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2379213 + ... + 2719156.

It is an arithmetic number, because the mean of its divisors is an integer number (68950355880).

Almost surely, 2^866579975668 is an apocalyptic number.

It is an amenable number.

866579975668 is a deficient number, since it is larger than the sum of its proper divisors (788228565452).

866579975668 is a wasteful number, since it uses less digits than its factorization.

866579975668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5102247 (or 5102245 counting only the distinct ones).

The product of its digits is 8230118400, while the sum is 82.

The spelling of 866579975668 in words is "eight hundred sixty-six billion, five hundred seventy-nine million, nine hundred seventy-five thousand, six hundred sixty-eight".