660220001408 has 72 divisors (see below), whose sum is σ = 1445944692465. Its totient is φ = 300054036480.

The previous prime is 660220001387. The next prime is 660220001453. The reversal of 660220001408 is 804100022066.

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 2 ways, for example, as 515765276224 + 144454725184 = 718168^2 + 380072^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=574552.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 101117888 + ... + 101124416.

Almost surely, 2^660220001408 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 660220001408

660220001408 is an abundant number, since it is smaller than the sum of its proper divisors (785724691057).

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

660220001408 is an frugal number, since it uses more digits than its factorization.

660220001408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13094 (or 6542 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The spelling of 660220001408 in words is "six hundred sixty billion, two hundred twenty million, one thousand, four hundred eight".