660244228 has 18 divisors (see below), whose sum is σ = 1344069006. Its totient is φ = 282961728.

The previous prime is 660244223. The next prime is 660244229. The reversal of 660244228 is 822442066.

It can be written as a sum of positive squares in only one way, i.e., 399680064 + 260564164 = 19992^2 + 16142^2 .

It is a junction number, because it is equal to n+sod(n) for n = 660244193 and 660244202.

It is not an unprimeable number, because it can be changed into a prime (660244223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1684101 + ... + 1684492.

Almost surely, 2^660244228 is an apocalyptic number.

It is an amenable number.

660244228 is an abundant number, since it is smaller than the sum of its proper divisors (683824778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660244228 is a wasteful number, since it uses less digits than its factorization.

660244228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3368611 (or 3368602 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 660244228 is about 25695.2179986861. The cubic root of 660244228 is about 870.7661494339.

The spelling of 660244228 in words is "six hundred sixty million, two hundred forty-four thousand, two hundred twenty-eight".