866666666668 has 48 divisors (see below), whose sum is σ = 1664100023040. Its totient is φ = 391665585600.

The previous prime is 866666666641. The next prime is 866666666759.

866666666668 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×866666666668² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 866666666594 and 866666666603.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39163855 + ... + 39185977.

It is an arithmetic number, because the mean of its divisors is an integer number (34668750480).

Almost surely, 2^866666666668 is an apocalyptic number.

It is an amenable number.

866666666668 is a deficient number, since it is larger than the sum of its proper divisors (797433356372).

866666666668 is a wasteful number, since it uses less digits than its factorization.

866666666668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27238 (or 27236 counting only the distinct ones).

The product of its digits is 3869835264, while the sum is 76.

The spelling of 866666666668 in words is "eight hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-eight".