27615166706689 has 2 divisors, whose sum is σ = 27615166706690. Its totient is φ = 27615166706688.

The previous prime is 27615166706651. The next prime is 27615166706707. The reversal of 27615166706689 is 98660766151672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24465933153025 + 3149233553664 = 4946305^2 + 1774608^2 .

It is a cyclic number.

It is not a de Polignac number, because 27615166706689 - 2¹¹ = 27615166704641 is a prime.

It is not a weakly prime, because it can be changed into another prime (27615166706089) 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 as a sum of consecutive naturals, namely, 13807583353344 + 13807583353345.

It is an arithmetic number, because the mean of its divisors is an integer number (13807583353345).

Almost surely, 2^{27615166706689} is an apocalyptic number.

It is an amenable number.

27615166706689 is a deficient number, since it is larger than the sum of its proper divisors (1).

27615166706689 is an equidigital number, since it uses as much as digits as its factorization.

27615166706689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 274337280, while the sum is 70.

The spelling of 27615166706689 in words is "twenty-seven trillion, six hundred fifteen billion, one hundred sixty-six million, seven hundred six thousand, six hundred eighty-nine".