66695225 has 12 divisors (see below), whose sum is σ = 87055440. Its totient is φ = 50547600.

The previous prime is 66695207. The next prime is 66695227. The reversal of 66695225 is 52259666.

It is not a de Polignac number, because 66695225 - 2²⁰ = 65646649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66695227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69731 + ... + 70680.

It is an arithmetic number, because the mean of its divisors is an integer number (7254620).

Almost surely, 2^66695225 is an apocalyptic number.

It is an amenable number.

66695225 is a deficient number, since it is larger than the sum of its proper divisors (20360215).

66695225 is a wasteful number, since it uses less digits than its factorization.

66695225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140440 (or 140435 counting only the distinct ones).

The product of its digits is 194400, while the sum is 41.

The square root of 66695225 is about 8166.7144556425. The cubic root of 66695225 is about 405.5380239567.

The spelling of 66695225 in words is "sixty-six million, six hundred ninety-five thousand, two hundred twenty-five".