66505325 has 12 divisors (see below), whose sum is σ = 82836960. Its totient is φ = 52965360.

The previous prime is 66505319. The next prime is 66505337. The reversal of 66505325 is 52350566.

66505325 = 1619² + 1620² + ... + 1643².

It is not a de Polignac number, because 66505325 - 2⁸ = 66505069 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66505291 and 66505300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185 + ... + 11534.

It is an arithmetic number, because the mean of its divisors is an integer number (6903080).

Almost surely, 2^66505325 is an apocalyptic number.

It is an amenable number.

66505325 is a deficient number, since it is larger than the sum of its proper divisors (16331635).

66505325 is a wasteful number, since it uses less digits than its factorization.

66505325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11956 (or 11951 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 66505325 is about 8155.0797053125. The cubic root of 66505325 is about 405.1527646029.

The spelling of 66505325 in words is "sixty-six million, five hundred five thousand, three hundred twenty-five".