66252225 has 36 divisors (see below), whose sum is σ = 118633776. Its totient is φ = 32610240.

The previous prime is 66252209. The next prime is 66252227. The reversal of 66252225 is 52225266.

It is not a de Polignac number, because 66252225 - 2⁴ = 66252209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66252192 and 66252201.

It is not an unprimeable number, because it can be changed into a prime (66252227) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10062 + ... + 15288.

Almost surely, 2^66252225 is an apocalyptic number.

66252225 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66252225 is a deficient number, since it is larger than the sum of its proper divisors (52381551).

66252225 is a wasteful number, since it uses less digits than its factorization.

66252225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5266 (or 5248 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 66252225 is about 8139.5469775658. The cubic root of 66252225 is about 404.6381465382.

The spelling of 66252225 in words is "sixty-six million, two hundred fifty-two thousand, two hundred twenty-five".