660660059549 has 32 divisors (see below), whose sum is σ = 778800960000. Its totient is φ = 548654146560.

The previous prime is 660660059489. The next prime is 660660059557. The reversal of 660660059549 is 945950066066.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660660059549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660660059494 and 660660059503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660660059749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135129497 + ... + 135134385.

It is an arithmetic number, because the mean of its divisors is an integer number (24337530000).

Almost surely, 2^660660059549 is an apocalyptic number.

It is an amenable number.

660660059549 is a deficient number, since it is larger than the sum of its proper divisors (118140900451).

660660059549 is a wasteful number, since it uses less digits than its factorization.

660660059549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8093.

The product of its (nonzero) digits is 10497600, while the sum is 56.

The spelling of 660660059549 in words is "six hundred sixty billion, six hundred sixty million, fifty-nine thousand, five hundred forty-nine".