16647661727 has 2 divisors, whose sum is σ = 16647661728. Its totient is φ = 16647661726.

The previous prime is 16647661651. The next prime is 16647661733. The reversal of 16647661727 is 72716674661.

It is a happy number.

16647661727 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16647661727 - 2²⁸ = 16379226271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16647661747) 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, 8323830863 + 8323830864.

It is an arithmetic number, because the mean of its divisors is an integer number (8323830864).

Almost surely, 2^16647661727 is an apocalyptic number.

16647661727 is a deficient number, since it is larger than the sum of its proper divisors (1).

16647661727 is an equidigital number, since it uses as much as digits as its factorization.

16647661727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3556224, while the sum is 53.

The spelling of 16647661727 in words is "sixteen billion, six hundred forty-seven million, six hundred sixty-one thousand, seven hundred twenty-seven".