27985720067 has 2 divisors, whose sum is σ = 27985720068. Its totient is φ = 27985720066.

The previous prime is 27985720033. The next prime is 27985720109. The reversal of 27985720067 is 76002758972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27985720067 - 2¹⁰ = 27985719043 is a prime.

It is not a weakly prime, because it can be changed into another prime (27985770067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13992860033 + 13992860034.

It is an arithmetic number, because the mean of its divisors is an integer number (13992860034).

Almost surely, 2^27985720067 is an apocalyptic number.

27985720067 is a deficient number, since it is larger than the sum of its proper divisors (1).

27985720067 is an equidigital number, since it uses as much as digits as its factorization.

27985720067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2963520, while the sum is 53.

The spelling of 27985720067 in words is "twenty-seven billion, nine hundred eighty-five million, seven hundred twenty thousand, sixty-seven".