666740674000 has 40 divisors (see below), whose sum is σ = 1612178954568. Its totient is φ = 266696268800.

The previous prime is 666740673971. The next prime is 666740674021. The reversal of 666740674000 is 476047666.

It can be written as a sum of positive squares in 4 ways, for example, as 2170069056 + 664570604944 = 46584^2 + 815212^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166683169 + ... + 166687168.

Almost surely, 2^666740674000 is an apocalyptic number.

It is an amenable number.

666740674000 is an abundant number, since it is smaller than the sum of its proper divisors (945438280568).

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

666740674000 is a wasteful number, since it uses less digits than its factorization.

666740674000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333370360 (or 333370344 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 46.

The spelling of 666740674000 in words is "six hundred sixty-six billion, seven hundred forty million, six hundred seventy-four thousand".