27766005577 has 2 divisors, whose sum is σ = 27766005578. Its totient is φ = 27766005576.

The previous prime is 27766005539. The next prime is 27766005581. The reversal of 27766005577 is 77550066772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23397985296 + 4368020281 = 152964^2 + 66091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27766005577 is a prime.

It is not a weakly prime, because it can be changed into another prime (27766005077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13883002788 + 13883002789.

It is an arithmetic number, because the mean of its divisors is an integer number (13883002789).

Almost surely, 2^27766005577 is an apocalyptic number.

It is an amenable number.

27766005577 is a deficient number, since it is larger than the sum of its proper divisors (1).

27766005577 is an equidigital number, since it uses as much as digits as its factorization.

27766005577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4321800, while the sum is 52.

The spelling of 27766005577 in words is "twenty-seven billion, seven hundred sixty-six million, five thousand, five hundred seventy-seven".