660505475 has 24 divisors (see below), whose sum is σ = 938059008. Its totient is φ = 451936800.

The previous prime is 660505441. The next prime is 660505481. The reversal of 660505475 is 574505066.

660505475 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 660505475 - 2²⁴ = 643728259 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82082 + ... + 89768.

It is an arithmetic number, because the mean of its divisors is an integer number (39085792).

Almost surely, 2^660505475 is an apocalyptic number.

660505475 is a deficient number, since it is larger than the sum of its proper divisors (277553533).

660505475 is a wasteful number, since it uses less digits than its factorization.

660505475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8195 (or 8190 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 660505475 is about 25700.3010682754. The cubic root of 660505475 is about 870.8809832268.

The spelling of 660505475 in words is "six hundred sixty million, five hundred five thousand, four hundred seventy-five".