27660131767 has 2 divisors, whose sum is σ = 27660131768. Its totient is φ = 27660131766.

The previous prime is 27660131761. The next prime is 27660131777. The reversal of 27660131767 is 76713106672.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27660131767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27660131761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13830065883 + 13830065884.

It is an arithmetic number, because the mean of its divisors is an integer number (13830065884).

Almost surely, 2^27660131767 is an apocalyptic number.

27660131767 is a deficient number, since it is larger than the sum of its proper divisors (1).

27660131767 is an equidigital number, since it uses as much as digits as its factorization.

27660131767 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 444528, while the sum is 46.

The spelling of 27660131767 in words is "twenty-seven billion, six hundred sixty million, one hundred thirty-one thousand, seven hundred sixty-seven".