660895225 has 24 divisors (see below), whose sum is σ = 857659392. Its totient is φ = 504240000.

The previous prime is 660895211. The next prime is 660895229. The reversal of 660895225 is 522598066.

It is not a de Polignac number, because 660895225 - 2⁷ = 660895097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660895229) 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, 218725 + ... + 221725.

It is an arithmetic number, because the mean of its divisors is an integer number (35735808).

Almost surely, 2^660895225 is an apocalyptic number.

It is an amenable number.

660895225 is a deficient number, since it is larger than the sum of its proper divisors (196764167).

660895225 is a wasteful number, since it uses less digits than its factorization.

660895225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3417 (or 3412 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 660895225 is about 25707.8825460208. The cubic root of 660895225 is about 871.0522455581.

The spelling of 660895225 in words is "six hundred sixty million, eight hundred ninety-five thousand, two hundred twenty-five".