27777783377 has 2 divisors, whose sum is σ = 27777783378. Its totient is φ = 27777783376.

The previous prime is 27777783367. The next prime is 27777783379. The reversal of 27777783377 is 77338777772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27302935696 + 474847681 = 165236^2 + 21791^2 .

It is a cyclic number.

It is not a de Polignac number, because 27777783377 - 2³² = 23482816081 is a prime.

Together with 27777783379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27777783379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13888891688 + 13888891689.

It is an arithmetic number, because the mean of its divisors is an integer number (13888891689).

Almost surely, 2^27777783377 is an apocalyptic number.

It is an amenable number.

27777783377 is a deficient number, since it is larger than the sum of its proper divisors (1).

27777783377 is an equidigital number, since it uses as much as digits as its factorization.

27777783377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 118590192, while the sum is 65.

The spelling of 27777783377 in words is "twenty-seven billion, seven hundred seventy-seven million, seven hundred eighty-three thousand, three hundred seventy-seven".