666918714 has 48 divisors (see below), whose sum is σ = 1692670176. Its totient is φ = 173224800.

The previous prime is 666918709. The next prime is 666918743. The reversal of 666918714 is 417819666.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99877 + ... + 106344.

It is an arithmetic number, because the mean of its divisors is an integer number (35263962).

Almost surely, 2^666918714 is an apocalyptic number.

666918714 is an abundant number, since it is smaller than the sum of its proper divisors (1025751462).

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

666918714 is a wasteful number, since it uses less digits than its factorization.

666918714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206251 (or 206244 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 666918714 is about 25824.7693890962. The cubic root of 666918714 is about 873.6905426783.

The spelling of 666918714 in words is "six hundred sixty-six million, nine hundred eighteen thousand, seven hundred fourteen".