666666700 has 36 divisors (see below), whose sum is σ = 1653335152. Its totient is φ = 228571200.

The previous prime is 666666691. The next prime is 666666719. The reversal of 666666700 is 7666666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 475491 + ... + 476890.

Almost surely, 2^666666700 is an apocalyptic number.

It is an amenable number.

666666700 is an abundant number, since it is smaller than the sum of its proper divisors (986668452).

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

666666700 is a wasteful number, since it uses less digits than its factorization.

666666700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952402 (or 952395 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 43.

The square root of 666666700 is about 25819.8896202133. The cubic root of 666666700 is about 873.5804792960.

The spelling of 666666700 in words is "six hundred sixty-six million, six hundred sixty-six thousand, seven hundred".