660444360 has 64 divisors (see below), whose sum is σ = 1996505280. Its totient is φ = 174769920.

The previous prime is 660444341. The next prime is 660444383. The reversal of 660444360 is 63444066.

660444360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5287 + ... + 36726.

It is an arithmetic number, because the mean of its divisors is an integer number (31195395).

Almost surely, 2^660444360 is an apocalyptic number.

660444360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660444360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (998252640).

660444360 is an abundant number, since it is smaller than the sum of its proper divisors (1336060920).

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

660444360 is a wasteful number, since it uses less digits than its factorization.

660444360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42158 (or 42154 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 660444360 is about 25699.1120469171. The cubic root of 660444360 is about 870.8541222166.

The spelling of 660444360 in words is "six hundred sixty million, four hundred forty-four thousand, three hundred sixty".