66317606325 has 18 divisors (see below), whose sum is σ = 118782201954. Its totient is φ = 35369389920.

The previous prime is 66317606317. The next prime is 66317606351. The reversal of 66317606325 is 52360671366.

66317606325 is a `hidden beast` number, since 6 + 6 + 3 + 1 + 7 + 6 + 0 + 632 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 2519939601 + 63797666724 = 50199^2 + 252582^2 .

It is not a de Polignac number, because 66317606325 - 2³ = 66317606317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 147372234 + ... + 147372683.

Almost surely, 2^66317606325 is an apocalyptic number.

It is an amenable number.

66317606325 is a deficient number, since it is larger than the sum of its proper divisors (52464595629).

66317606325 is a wasteful number, since it uses less digits than its factorization.

66317606325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294744933 (or 294744925 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 45.

The spelling of 66317606325 in words is "sixty-six billion, three hundred seventeen million, six hundred six thousand, three hundred twenty-five".