16665560556 has 24 divisors (see below), whose sum is σ = 38890104624. Its totient is φ = 5554644480.

The previous prime is 16665560531. The next prime is 16665560641. The reversal of 16665560556 is 65506556661.

16665560556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 16665560499 and 16665560508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71716 + ... + 196148.

It is an arithmetic number, because the mean of its divisors is an integer number (1620421026).

Almost surely, 2^16665560556 is an apocalyptic number.

It is an amenable number.

16665560556 is an abundant number, since it is smaller than the sum of its proper divisors (22224544068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16665560556 is a wasteful number, since it uses less digits than its factorization.

16665560556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135601 (or 135599 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 51.

The spelling of 16665560556 in words is "sixteen billion, six hundred sixty-five million, five hundred sixty thousand, five hundred fifty-six".