660513275 has 12 divisors (see below), whose sum is σ = 824538000. Its totient is φ = 524861280.

The previous prime is 660513221. The next prime is 660513313. The reversal of 660513275 is 572315066.

It is a de Polignac number, because none of the positive numbers 2^k-660513275 is a prime.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 84935 + ... + 92384.

It is an arithmetic number, because the mean of its divisors is an integer number (68711500).

Almost surely, 2^660513275 is an apocalyptic number.

660513275 is a deficient number, since it is larger than the sum of its proper divisors (164024725).

660513275 is a wasteful number, since it uses less digits than its factorization.

660513275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177478 (or 177473 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 660513275 is about 25700.4528170225. The cubic root of 660513275 is about 870.8844113311.

The spelling of 660513275 in words is "six hundred sixty million, five hundred thirteen thousand, two hundred seventy-five".