13660506556 has 12 divisors (see below), whose sum is σ = 24088375080. Its totient is φ = 6778113680.

The previous prime is 13660506533. The next prime is 13660506623. The reversal of 13660506556 is 65560506631.

It is a super-2 number, since 2×13660506556² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13034311 + ... + 13035358.

It is an arithmetic number, because the mean of its divisors is an integer number (2007364590).

Almost surely, 2^13660506556 is an apocalyptic number.

It is an amenable number.

13660506556 is a deficient number, since it is larger than the sum of its proper divisors (10427868524).

13660506556 is a wasteful number, since it uses less digits than its factorization.

13660506556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26069804 (or 26069802 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 43.

The spelling of 13660506556 in words is "thirteen billion, six hundred sixty million, five hundred six thousand, five hundred fifty-six".