666868682 has 16 divisors (see below), whose sum is σ = 1024607232. Its totient is φ = 325348800.

The previous prime is 666868667. The next prime is 666868687. The reversal of 666868682 is 286868666.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (666868687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95618 + ... + 102354.

It is an arithmetic number, because the mean of its divisors is an integer number (64037952).

Almost surely, 2^666868682 is an apocalyptic number.

666868682 is a deficient number, since it is larger than the sum of its proper divisors (357738550).

666868682 is a wasteful number, since it uses less digits than its factorization.

666868682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7933.

The product of its digits is 7962624, while the sum is 56.

The square root of 666868682 is about 25823.8006885121. The cubic root of 666868682 is about 873.6686941494.

The spelling of 666868682 in words is "six hundred sixty-six million, eight hundred sixty-eight thousand, six hundred eighty-two".