27066540565 has 16 divisors (see below), whose sum is σ = 35576308080. Its totient is φ = 19676769280.

The previous prime is 27066540521. The next prime is 27066540581. The reversal of 27066540565 is 56504566072.

It can be written as a sum of positive squares in 8 ways, for example, as 2694959569 + 24371580996 = 51913^2 + 156114^2 .

It is not a de Polignac number, because 27066540565 - 2⁷ = 27066540437 is a prime.

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, 5487706 + ... + 5492635.

It is an arithmetic number, because the mean of its divisors is an integer number (2223519255).

Almost surely, 2^27066540565 is an apocalyptic number.

It is an amenable number.

27066540565 is a deficient number, since it is larger than the sum of its proper divisors (8509767515).

27066540565 is a wasteful number, since it uses less digits than its factorization.

27066540565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10980392.

The product of its (nonzero) digits is 1512000, while the sum is 46.

The spelling of 27066540565 in words is "twenty-seven billion, sixty-six million, five hundred forty thousand, five hundred sixty-five".