27721182667 has 2 divisors, whose sum is σ = 27721182668. Its totient is φ = 27721182666.

The previous prime is 27721182649. The next prime is 27721182739. The reversal of 27721182667 is 76628112772.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27721182667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27721182667.

It is not a weakly prime, because it can be changed into another prime (27721182067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13860591333 + 13860591334.

It is an arithmetic number, because the mean of its divisors is an integer number (13860591334).

Almost surely, 2^27721182667 is an apocalyptic number.

27721182667 is a deficient number, since it is larger than the sum of its proper divisors (1).

27721182667 is an equidigital number, since it uses as much as digits as its factorization.

27721182667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 790272, while the sum is 49.

The spelling of 27721182667 in words is "twenty-seven billion, seven hundred twenty-one million, one hundred eighty-two thousand, six hundred sixty-seven".