660869228 has 12 divisors (see below), whose sum is σ = 1156963752. Its totient is φ = 330308160.

The previous prime is 660869171. The next prime is 660869263. The reversal of 660869228 is 822968066.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19325 + ... + 41172.

It is an arithmetic number, because the mean of its divisors is an integer number (96413646).

Almost surely, 2^660869228 is an apocalyptic number.

It is an amenable number.

660869228 is a deficient number, since it is larger than the sum of its proper divisors (496094524).

660869228 is a wasteful number, since it uses less digits than its factorization.

660869228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63232 (or 63230 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 660869228 is about 25707.3769179199. The cubic root of 660869228 is about 871.0408241602.

The spelling of 660869228 in words is "six hundred sixty million, eight hundred sixty-nine thousand, two hundred twenty-eight".