664841725120 has 56 divisors (see below), whose sum is σ = 1585445991408. Its totient is φ = 265551744000.

The previous prime is 664841725111. The next prime is 664841725151. The reversal of 664841725120 is 21527148466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1282231 + ... + 1724470.

Almost surely, 2^664841725120 is an apocalyptic number.

It is an amenable number.

664841725120 is an abundant number, since it is smaller than the sum of its proper divisors (920604266288).

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

664841725120 is a wasteful number, since it uses less digits than its factorization.

664841725120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007409 (or 3007399 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 664841725120 in words is "six hundred sixty-four billion, eight hundred forty-one million, seven hundred twenty-five thousand, one hundred twenty".