660534616224 has 144 divisors (see below), whose sum is σ = 2150361525312. Its totient is φ = 188405581824.

The previous prime is 660534616223. The next prime is 660534616241. The reversal of 660534616224 is 422616435066.

It is a happy number.

660534616224 is a `hidden beast` number, since 6 + 6 + 0 + 5 + 3 + 4 + 616 + 2 + 24 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 660534616224.

It is not an unprimeable number, because it can be changed into a prime (660534616223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 919227 + ... + 1471749.

It is an arithmetic number, because the mean of its divisors is an integer number (14933066148).

Almost surely, 2^660534616224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660534616224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1075180762656).

660534616224 is an abundant number, since it is smaller than the sum of its proper divisors (1489826909088).

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

660534616224 is a wasteful number, since it uses less digits than its factorization.

660534616224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553139 (or 553128 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 660534616224 in words is "six hundred sixty billion, five hundred thirty-four million, six hundred sixteen thousand, two hundred twenty-four".