660988512144 has 45 divisors (see below), whose sum is σ = 1849877098459. Its totient is φ = 220326252000.

The previous prime is 660988512131. The next prime is 660988512187. The reversal of 660988512144 is 441215889066.

The square root of 660988512144 is 813012.

It is a perfect power (a square), and thus also a powerful number.

660988512144 is a `hidden beast` number, since 6 + 6 + 0 + 9 + 88 + 512 + 1 + 44 = 666.

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, 9722269 + ... + 9790019.

Almost surely, 2^660988512144 is an apocalyptic number.

660988512144 is the 813012-nd square number.

It is an amenable number.

660988512144 is an abundant number, since it is smaller than the sum of its proper divisors (1188888586315).

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

660988512144 is an frugal number, since it uses more digits than its factorization.

660988512144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135516 (or 67756 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 660988512144 in words is "six hundred sixty billion, nine hundred eighty-eight million, five hundred twelve thousand, one hundred forty-four".