660225 has 12 divisors (see below), whose sum is σ = 1091696. Its totient is φ = 352080.

The previous prime is 660217. The next prime is 660227. The reversal of 660225 is 522066.

It is not a de Polignac number, because 660225 - 2³ = 660217 is a prime.

It is a Duffinian number.

660225 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660225.

It is not an unprimeable number, because it can be changed into a prime (660227) 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, 4327 + ... + 4476.

2⁶⁶⁰²²⁵ is an apocalyptic number.

It is an amenable number.

660225 is a deficient number, since it is larger than the sum of its proper divisors (431471).

660225 is a wasteful number, since it uses less digits than its factorization.

660225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8816 (or 8811 counting only the distinct ones).

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

The square root of 660225 is about 812.5423065909. The cubic root of 660225 is about 87.0757696373.

The spelling of 660225 in words is "six hundred sixty thousand, two hundred twenty-five".