666900949632 has 64 divisors (see below), whose sum is σ = 1781695452960. Its totient is φ = 221015321600.

The previous prime is 666900949619. The next prime is 666900949681. The reversal of 666900949632 is 236949009666.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4952994 + ... + 5085857.

Almost surely, 2^666900949632 is an apocalyptic number.

It is an amenable number.

666900949632 is an abundant number, since it is smaller than the sum of its proper divisors (1114794503328).

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

666900949632 is a wasteful number, since it uses less digits than its factorization.

666900949632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10039041 (or 10039029 counting only the distinct ones).

The product of its (nonzero) digits is 22674816, while the sum is 60.

The spelling of 666900949632 in words is "six hundred sixty-six billion, nine hundred million, nine hundred forty-nine thousand, six hundred thirty-two".