660565506005 has 32 divisors (see below), whose sum is σ = 813747271680. Its totient is φ = 514463201280.

The previous prime is 660565505987. The next prime is 660565506017. The reversal of 660565506005 is 500605565066.

It is not a de Polignac number, because 660565506005 - 2¹⁴ = 660565489621 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 299303612 + ... + 299305818.

It is an arithmetic number, because the mean of its divisors is an integer number (25429602240).

Almost surely, 2^660565506005 is an apocalyptic number.

It is an amenable number.

660565506005 is a deficient number, since it is larger than the sum of its proper divisors (153181765675).

660565506005 is a wasteful number, since it uses less digits than its factorization.

660565506005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4709.

The product of its (nonzero) digits is 810000, while the sum is 44.

The spelling of 660565506005 in words is "six hundred sixty billion, five hundred sixty-five million, five hundred six thousand, five".