16550661660566 has 32 divisors (see below), whose sum is σ = 29234915539200. Its totient is φ = 6947803989280.

The previous prime is 16550661660493. The next prime is 16550661660571. The reversal of 16550661660566 is 66506616605561.

It is a happy number.

16550661660566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 563930456 + ... + 563959803.

It is an arithmetic number, because the mean of its divisors is an integer number (913591110600).

Almost surely, 2^{16550661660566} is an apocalyptic number.

16550661660566 is a deficient number, since it is larger than the sum of its proper divisors (12684253878634).

16550661660566 is a wasteful number, since it uses less digits than its factorization.

16550661660566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127890324.

The product of its (nonzero) digits is 34992000, while the sum is 59.

The spelling of 16550661660566 in words is "sixteen trillion, five hundred fifty billion, six hundred sixty-one million, six hundred sixty thousand, five hundred sixty-six".