660552816375 has 64 divisors (see below), whose sum is σ = 1221773155200. Its totient is φ = 352155110400.

The previous prime is 660552816359. The next prime is 660552816379. The reversal of 660552816375 is 573618255066.

It is a happy number.

660552816375 is a `hidden beast` number, since 6 + 6 + 0 + 552 + 8 + 16 + 3 + 75 = 666.

It is not a de Polignac number, because 660552816375 - 2⁴ = 660552816359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660552816379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8767867 + ... + 8842883.

It is an arithmetic number, because the mean of its divisors is an integer number (19090205550).

Almost surely, 2^660552816375 is an apocalyptic number.

660552816375 is a deficient number, since it is larger than the sum of its proper divisors (561220338825).

660552816375 is a wasteful number, since it uses less digits than its factorization.

660552816375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77650 (or 77634 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 54.

The spelling of 660552816375 in words is "six hundred sixty billion, five hundred fifty-two million, eight hundred sixteen thousand, three hundred seventy-five".