66225 has 12 divisors (see below), whose sum is σ = 109616. Its totient is φ = 35280.

The previous prime is 66221. The next prime is 66239. The reversal of 66225 is 52266.

It is not a de Polignac number, because 66225 - 2² = 66221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66221) 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, 367 + ... + 516.

2⁶⁶²²⁵ is an apocalyptic number.

It is an amenable number.

66225 is a deficient number, since it is larger than the sum of its proper divisors (43391).

66225 is a wasteful number, since it uses less digits than its factorization.

66225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896 (or 891 counting only the distinct ones).

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

The square root of 66225 is about 257.3421846492. The cubic root of 66225 is about 40.4582713015.

The spelling of 66225 in words is "sixty-six thousand, two hundred twenty-five".