66000225 has 24 divisors (see below), whose sum is σ = 113867712. Its totient is φ = 33668800.

The previous prime is 66000223. The next prime is 66000229. The reversal of 66000225 is 52200066.

It is not a de Polignac number, because 66000225 - 2¹ = 66000223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66000223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17406 + ... + 20855.

It is an arithmetic number, because the mean of its divisors is an integer number (4744488).

Almost surely, 2^66000225 is an apocalyptic number.

It is an amenable number.

66000225 is a deficient number, since it is larger than the sum of its proper divisors (47867487).

66000225 is a wasteful number, since it uses less digits than its factorization.

66000225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38297 (or 38292 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 66000225 is about 8124.0522524169. The cubic root of 66000225 is about 404.1244612935.

The spelling of 66000225 in words is "sixty-six million, two hundred twenty-five", and thus it is an aban number.