16566563122 has 32 divisors (see below), whose sum is σ = 26142326784. Its totient is φ = 7863393600.

The previous prime is 16566563107. The next prime is 16566563129. The reversal of 16566563122 is 22136566561.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (16566563129) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1442788 + ... + 1454224.

It is an arithmetic number, because the mean of its divisors is an integer number (816947712).

Almost surely, 2^16566563122 is an apocalyptic number.

16566563122 is a deficient number, since it is larger than the sum of its proper divisors (9575763662).

16566563122 is a wasteful number, since it uses less digits than its factorization.

16566563122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11914.

The product of its digits is 388800, while the sum is 43.

The spelling of 16566563122 in words is "sixteen billion, five hundred sixty-six million, five hundred sixty-three thousand, one hundred twenty-two".