660505055005 has 4 divisors (see below), whose sum is σ = 792606066012. Its totient is φ = 528404044000.

The previous prime is 660505054969. The next prime is 660505055039. The reversal of 660505055005 is 500550505066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 144927921636 + 515577133369 = 380694^2 + 718037^2 .

It is not a de Polignac number, because 660505055005 - 2⁷ = 660505054877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66050505496 + ... + 66050505505.

It is an arithmetic number, because the mean of its divisors is an integer number (198151516503).

Almost surely, 2^660505055005 is an apocalyptic number.

It is an amenable number.

660505055005 is a deficient number, since it is larger than the sum of its proper divisors (132101011007).

660505055005 is a wasteful number, since it uses less digits than its factorization.

660505055005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132101011006.

The product of its (nonzero) digits is 112500, while the sum is 37.

The spelling of 660505055005 in words is "six hundred sixty billion, five hundred five million, fifty-five thousand, five".