666956000 has 48 divisors (see below), whose sum is σ = 1638720720. Its totient is φ = 266780800.

The previous prime is 666955997. The next prime is 666956021. The reversal of 666956000 is 659666.

It is a congruent number.

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, 79370 + ... + 87369.

It is an arithmetic number, because the mean of its divisors is an integer number (34140015).

Almost surely, 2^666956000 is an apocalyptic number.

It is an amenable number.

666956000 is an abundant number, since it is smaller than the sum of its proper divisors (971764720).

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

666956000 is a wasteful number, since it uses less digits than its factorization.

666956000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166764 (or 166746 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 666956000 is about 25825.4912828391. The cubic root of 666956000 is about 873.7068244319.

The spelling of 666956000 in words is "six hundred sixty-six million, nine hundred fifty-six thousand".