660550553520 has 160 divisors (see below), whose sum is σ = 2405697525504. Its totient is φ = 147815500800.

The previous prime is 660550553491. The next prime is 660550553561. The reversal of 660550553520 is 25355055066.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9589086 + ... + 9657725.

Almost surely, 2^660550553520 is an apocalyptic number.

660550553520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

660550553520 is an abundant number, since it is smaller than the sum of its proper divisors (1745146971984).

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

660550553520 is a wasteful number, since it uses less digits than its factorization.

660550553520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19246851 (or 19246845 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 42.

The spelling of 660550553520 in words is "six hundred sixty billion, five hundred fifty million, five hundred fifty-three thousand, five hundred twenty".