27665701867 has 2 divisors, whose sum is σ = 27665701868. Its totient is φ = 27665701866.

The previous prime is 27665701831. The next prime is 27665701879. The reversal of 27665701867 is 76810756672.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27665701867 - 2²³ = 27657313259 is a prime.

It is not a weakly prime, because it can be changed into another prime (27665701807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13832850933 + 13832850934.

It is an arithmetic number, because the mean of its divisors is an integer number (13832850934).

Almost surely, 2^27665701867 is an apocalyptic number.

27665701867 is a deficient number, since it is larger than the sum of its proper divisors (1).

27665701867 is an equidigital number, since it uses as much as digits as its factorization.

27665701867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5927040, while the sum is 55.

The spelling of 27665701867 in words is "twenty-seven billion, six hundred sixty-five million, seven hundred one thousand, eight hundred sixty-seven".