15660165060656 has 20 divisors (see below), whose sum is σ = 30378258548712. Its totient is φ = 7820614467456.

The previous prime is 15660165060643. The next prime is 15660165060671. The reversal of 15660165060656 is 65606056106651.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 15660165060598 and 15660165060607.

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, 591740285 + ... + 591766748.

Almost surely, 2^{15660165060656} is an apocalyptic number.

15660165060656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15660165060656 is a deficient number, since it is larger than the sum of its proper divisors (14718093488056).

15660165060656 is a wasteful number, since it uses less digits than its factorization.

15660165060656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183507868 (or 1183507862 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 53.

The spelling of 15660165060656 in words is "fifteen trillion, six hundred sixty billion, one hundred sixty-five million, sixty thousand, six hundred fifty-six".