16661052747271 has 2 divisors, whose sum is σ = 16661052747272. Its totient is φ = 16661052747270.

The previous prime is 16661052747217. The next prime is 16661052747301. The reversal of 16661052747271 is 17274725016661.

Together with previous prime (16661052747217) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16661052747271 - 2¹¹ = 16661052745223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16661052747571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8330526373635 + 8330526373636.

It is an arithmetic number, because the mean of its divisors is an integer number (8330526373636).

Almost surely, 2^{16661052747271} is an apocalyptic number.

16661052747271 is a deficient number, since it is larger than the sum of its proper divisors (1).

16661052747271 is an equidigital number, since it uses as much as digits as its factorization.

16661052747271 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 16661052747271 in words is "sixteen trillion, six hundred sixty-one billion, fifty-two million, seven hundred forty-seven thousand, two hundred seventy-one".