660506020605 has 24 divisors (see below), whose sum is σ = 1161964825632. Its totient is φ = 347012116704.

The previous prime is 660506020583. The next prime is 660506020639. The reversal of 660506020605 is 506020605066.

It is not a de Polignac number, because 660506020605 - 2¹⁶ = 660505955069 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 660506020605.

It is a congruent 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, 109533639 + ... + 109539668.

It is an arithmetic number, because the mean of its divisors is an integer number (48415201068).

Almost surely, 2^660506020605 is an apocalyptic number.

It is an amenable number.

660506020605 is a deficient number, since it is larger than the sum of its proper divisors (501458805027).

660506020605 is a wasteful number, since it uses less digits than its factorization.

660506020605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219073385 (or 219073382 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 660506020605 in words is "six hundred sixty billion, five hundred six million, twenty thousand, six hundred five".