666906700 has 18 divisors (see below), whose sum is σ = 1447187756. Its totient is φ = 266762640.

The previous prime is 666906679. The next prime is 666906701. The reversal of 666906700 is 7609666.

It is not an unprimeable number, because it can be changed into a prime (666906701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3334434 + ... + 3334633.

Almost surely, 2^666906700 is an apocalyptic number.

It is an amenable number.

666906700 is an abundant number, since it is smaller than the sum of its proper divisors (780281056).

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

666906700 is a wasteful number, since it uses less digits than its factorization.

666906700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6669081 (or 6669074 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 666906700 is about 25824.5367819057. The cubic root of 666906700 is about 873.6852963712.

The spelling of 666906700 in words is "six hundred sixty-six million, nine hundred six thousand, seven hundred".