866666668 has 24 divisors (see below), whose sum is σ = 1745811200. Its totient is φ = 368754768.

The previous prime is 866666609. The next prime is 866666687.

866666668 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×866666668² = 1502222226844444448, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107448 + ... + 115231.

Almost surely, 2^866666668 is an apocalyptic number.

It is an amenable number.

866666668 is an abundant number, since it is smaller than the sum of its proper divisors (879144532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866666668 is a wasteful number, since it uses less digits than its factorization.

866666668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222829 (or 222827 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 58.

The square root of 866666668 is about 29439.2029104050. The cubic root of 866666668 is about 953.4195024833.

The spelling of 866666668 in words is "eight hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-eight".