660210225 has 12 divisors (see below), whose sum is σ = 1091547696. Its totient is φ = 352112080.

The previous prime is 660210217. The next prime is 660210247. The reversal of 660210225 is 522012066.

It is not a de Polignac number, because 660210225 - 2³ = 660210217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660210195 and 660210204.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4401327 + ... + 4401476.

It is an arithmetic number, because the mean of its divisors is an integer number (90962308).

Almost surely, 2^660210225 is an apocalyptic number.

It is an amenable number.

660210225 is a deficient number, since it is larger than the sum of its proper divisors (431337471).

660210225 is a wasteful number, since it uses less digits than its factorization.

660210225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8802816 (or 8802811 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 660210225 is about 25694.5563300867. The cubic root of 660210225 is about 870.7512008394.

The spelling of 660210225 in words is "six hundred sixty million, two hundred ten thousand, two hundred twenty-five".