66656530325 has 48 divisors (see below), whose sum is σ = 104111919744. Its totient is φ = 41123635200.

The previous prime is 66656530321. The next prime is 66656530333. The reversal of 66656530325 is 52303565666.

It is not a de Polignac number, because 66656530325 - 2² = 66656530321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66656530325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66656530321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8237 + ... + 365213.

It is an arithmetic number, because the mean of its divisors is an integer number (2168998328).

Almost surely, 2^66656530325 is an apocalyptic number.

It is an amenable number.

66656530325 is a deficient number, since it is larger than the sum of its proper divisors (37455389419).

66656530325 is a wasteful number, since it uses less digits than its factorization.

66656530325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357102 (or 357097 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 47.

The spelling of 66656530325 in words is "sixty-six billion, six hundred fifty-six million, five hundred thirty thousand, three hundred twenty-five".