66464125056 has 96 divisors (see below), whose sum is σ = 218579961600. Its totient is φ = 18989747712.

The previous prime is 66464125037. The next prime is 66464125067. The reversal of 66464125056 is 65052146466.

66464125056 is a `hidden beast` number, since 66 + 46 + 41 + 2 + 505 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4112976 + ... + 4129103.

It is an arithmetic number, because the mean of its divisors is an integer number (2276874600).

Almost surely, 2^66464125056 is an apocalyptic number.

It is an amenable number.

66464125056 is an abundant number, since it is smaller than the sum of its proper divisors (152115836544).

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

66464125056 is a wasteful number, since it uses less digits than its factorization.

66464125056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8242106 (or 8242091 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 66464125056 in words is "sixty-six billion, four hundred sixty-four million, one hundred twenty-five thousand, fifty-six".