27666161287 has 2 divisors, whose sum is σ = 27666161288. Its totient is φ = 27666161286.

The previous prime is 27666161251. The next prime is 27666161297. The reversal of 27666161287 is 78216166672.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27666161287 - 2²³ = 27657772679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27666161207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13833080643 + 13833080644.

It is an arithmetic number, because the mean of its divisors is an integer number (13833080644).

Almost surely, 2^27666161287 is an apocalyptic number.

27666161287 is a deficient number, since it is larger than the sum of its proper divisors (1).

27666161287 is an equidigital number, since it uses as much as digits as its factorization.

27666161287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 52.

The spelling of 27666161287 in words is "twenty-seven billion, six hundred sixty-six million, one hundred sixty-one thousand, two hundred eighty-seven".