27777657967 has 2 divisors, whose sum is σ = 27777657968. Its totient is φ = 27777657966.

The previous prime is 27777657959. The next prime is 27777657997. The reversal of 27777657967 is 76975677772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27777657967 - 2³ = 27777657959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27777657896 and 27777657905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27777657997) 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, 13888828983 + 13888828984.

It is an arithmetic number, because the mean of its divisors is an integer number (13888828984).

Almost surely, 2^27777657967 is an apocalyptic number.

27777657967 is a deficient number, since it is larger than the sum of its proper divisors (1).

27777657967 is an equidigital number, since it uses as much as digits as its factorization.

27777657967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381182760, while the sum is 70.

The spelling of 27777657967 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred fifty-seven thousand, nine hundred sixty-seven".