660459744000 has 1440 divisors, whose sum is σ = 2847391747200. Its totient is φ = 148901068800.

The previous prime is 660459743981. The next prime is 660459744017. The reversal of 660459744000 is 447954066.

660459744000 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1614815796 + ... + 1614816204.

It is an arithmetic number, because the mean of its divisors is an integer number (1977355380).

Almost surely, 2^660459744000 is an apocalyptic number.

660459744000 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 660459744000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1423695873600).

660459744000 is an abundant number, since it is smaller than the sum of its proper divisors (2186932003200).

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

660459744000 is an equidigital number, since it uses as much as digits as its factorization.

660459744000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 660459744000 in words is "six hundred sixty billion, four hundred fifty-nine million, seven hundred forty-four thousand".