16566773606247 has 16 divisors (see below), whose sum is σ = 22112002316000. Its totient is φ = 11033031389184.

The previous prime is 16566773606219. The next prime is 16566773606287. The reversal of 16566773606247 is 74260637766561.

It is not a de Polignac number, because 16566773606247 - 2²² = 16566769411943 is a prime.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16566773606287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67588629 + ... + 67833297.

It is an arithmetic number, because the mean of its divisors is an integer number (1382000144750).

Almost surely, 2^{16566773606247} is an apocalyptic number.

16566773606247 is a deficient number, since it is larger than the sum of its proper divisors (5545228709753).

16566773606247 is a wasteful number, since it uses less digits than its factorization.

16566773606247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268050.

The product of its (nonzero) digits is 320060160, while the sum is 66.

The spelling of 16566773606247 in words is "sixteen trillion, five hundred sixty-six billion, seven hundred seventy-three million, six hundred six thousand, two hundred forty-seven".