66507325 has 12 divisors (see below), whose sum is σ = 82836340. Its totient is φ = 52968960.

The previous prime is 66507317. The next prime is 66507347. The reversal of 66507325 is 52370566.

It can be written as a sum of positive squares in 6 ways, for example, as 101124 + 66406201 = 318^2 + 8149^2 .

It is not a de Polignac number, because 66507325 - 2³ = 66507317 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

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, 84 + ... + 11533.

Almost surely, 2^66507325 is an apocalyptic number.

It is an amenable number.

66507325 is a deficient number, since it is larger than the sum of its proper divisors (16329015).

66507325 is a wasteful number, since it uses less digits than its factorization.

66507325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11856 (or 11851 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 66507325 is about 8155.2023273491. The cubic root of 66507325 is about 405.1568259188.

The spelling of 66507325 in words is "sixty-six million, five hundred seven thousand, three hundred twenty-five".