660449842208 has 162 divisors, whose sum is σ = 1447110291879. Its totient is φ = 296575598592.

The previous prime is 660449842193. The next prime is 660449842211. The reversal of 660449842208 is 802248944066.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 499979096464 + 160470745744 = 707092^2 + 400588^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=574652.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 660449842208.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2569843616 + ... + 2569843872.

Almost surely, 2^660449842208 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 660449842208

660449842208 is an abundant number, since it is smaller than the sum of its proper divisors (786660449671).

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

660449842208 is an equidigital number, since it uses as much as digits as its factorization.

660449842208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 53.

The spelling of 660449842208 in words is "six hundred sixty billion, four hundred forty-nine million, eight hundred forty-two thousand, two hundred eight".