16566172041443 has 4 divisors (see below), whose sum is σ = 16566180182280. Its totient is φ = 16566163900608.

The previous prime is 16566172041439. The next prime is 16566172041449. The reversal of 16566172041443 is 34414027166561.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16566172041443 - 2² = 16566172041439 is a prime.

It is a super-2 number, since 2×16566172041443² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16566172041391 and 16566172041400.

It is not an unprimeable number, because it can be changed into a prime (16566172041449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1965971 + ... + 6082547.

It is an arithmetic number, because the mean of its divisors is an integer number (4141545045570).

Almost surely, 2^{16566172041443} is an apocalyptic number.

16566172041443 is a deficient number, since it is larger than the sum of its proper divisors (8140837).

16566172041443 is an equidigital number, since it uses as much as digits as its factorization.

16566172041443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8140836.

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 16566172041443 in words is "sixteen trillion, five hundred sixty-six billion, one hundred seventy-two million, forty-one thousand, four hundred forty-three".