65657225 has 12 divisors (see below), whose sum is σ = 84042240. Its totient is φ = 50830800.

The previous prime is 65657209. The next prime is 65657237. The reversal of 65657225 is 52275656.

It is not a de Polignac number, because 65657225 - 2⁴ = 65657209 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon 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, 41585 + ... + 43134.

It is an arithmetic number, because the mean of its divisors is an integer number (7003520).

Almost surely, 2^65657225 is an apocalyptic number.

It is an amenable number.

65657225 is a deficient number, since it is larger than the sum of its proper divisors (18385015).

65657225 is a wasteful number, since it uses less digits than its factorization.

65657225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84760 (or 84755 counting only the distinct ones).

The product of its digits is 126000, while the sum is 38.

The square root of 65657225 is about 8102.9145990810. The cubic root of 65657225 is about 403.4231732269.

The spelling of 65657225 in words is "sixty-five million, six hundred fifty-seven thousand, two hundred twenty-five".