27866955757 has 2 divisors, whose sum is σ = 27866955758. Its totient is φ = 27866955756.

The previous prime is 27866955707. The next prime is 27866955769. The reversal of 27866955757 is 75755966872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14120331241 + 13746624516 = 118829^2 + 117246^2 .

It is a cyclic number.

It is not a de Polignac number, because 27866955757 - 2¹⁹ = 27866431469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27866955692 and 27866955701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27866955707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13933477878 + 13933477879.

It is an arithmetic number, because the mean of its divisors is an integer number (13933477879).

Almost surely, 2^27866955757 is an apocalyptic number.

It is an amenable number.

27866955757 is a deficient number, since it is larger than the sum of its proper divisors (1).

27866955757 is an equidigital number, since it uses as much as digits as its factorization.

27866955757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 222264000, while the sum is 67.

The spelling of 27866955757 in words is "twenty-seven billion, eight hundred sixty-six million, nine hundred fifty-five thousand, seven hundred fifty-seven".