66075325780325 has 12 divisors (see below), whose sum is σ = 82015583942340. Its totient is φ = 52807241285760.

The previous prime is 66075325780313. The next prime is 66075325780333. The reversal of 66075325780325 is 52308752357066.

It can be written as a sum of positive squares in 6 ways, for example, as 5910373627876 + 60164952152449 = 2431126^2 + 7756607^2 .

It is not a de Polignac number, because 66075325780325 - 2²⁰ = 66075324731749 is a prime.

It is a congruent number.

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, 1325458040 + ... + 1325507889.

It is an arithmetic number, because the mean of its divisors is an integer number (6834631995195).

Almost surely, 2^{66075325780325} is an apocalyptic number.

It is an amenable number.

66075325780325 is a deficient number, since it is larger than the sum of its proper divisors (15940258162015).

66075325780325 is a wasteful number, since it uses less digits than its factorization.

66075325780325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650966936 (or 2650966931 counting only the distinct ones).

The product of its (nonzero) digits is 63504000, while the sum is 59.

The spelling of 66075325780325 in words is "sixty-six trillion, seventy-five billion, three hundred twenty-five million, seven hundred eighty thousand, three hundred twenty-five".