16066500565105 has 4 divisors (see below), whose sum is σ = 19279800678132. Its totient is φ = 12853200452080.

The previous prime is 16066500565091. The next prime is 16066500565109. The reversal of 16066500565105 is 50156500566061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11048291266609 + 5018209298496 = 3323897^2 + 2240136^2 .

It is not a de Polignac number, because 16066500565105 - 2³⁷ = 15929061611633 is a prime.

It is a super-2 number, since 2×16066500565105² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16066500565109) 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, 1606650056506 + ... + 1606650056515.

It is an arithmetic number, because the mean of its divisors is an integer number (4819950169533).

Almost surely, 2^{16066500565105} is an apocalyptic number.

It is an amenable number.

16066500565105 is a deficient number, since it is larger than the sum of its proper divisors (3213300113027).

16066500565105 is an equidigital number, since it uses as much as digits as its factorization.

16066500565105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213300113026.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 16066500565105 in words is "sixteen trillion, sixty-six billion, five hundred million, five hundred sixty-five thousand, one hundred five".