66717325 has 6 divisors (see below), whose sum is σ = 82729514. Its totient is φ = 53373840.

The previous prime is 66717289. The next prime is 66717331. The reversal of 66717325 is 52371766.

It can be written as a sum of positive squares in 3 ways, for example, as 11095561 + 55621764 = 3331^2 + 7458^2 .

It is not a de Polignac number, because 66717325 - 2¹¹ = 66715277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1334322 + ... + 1334371.

Almost surely, 2^66717325 is an apocalyptic number.

It is an amenable number.

66717325 is a deficient number, since it is larger than the sum of its proper divisors (16012189).

66717325 is a wasteful number, since it uses less digits than its factorization.

66717325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668703 (or 2668698 counting only the distinct ones).

The product of its digits is 52920, while the sum is 37.

The square root of 66717325 is about 8168.0673968816. The cubic root of 66717325 is about 405.5828117736.

The spelling of 66717325 in words is "sixty-six million, seven hundred seventeen thousand, three hundred twenty-five".