16666568041 has 2 divisors, whose sum is σ = 16666568042. Its totient is φ = 16666568040.

The previous prime is 16666567999. The next prime is 16666568053. The reversal of 16666568041 is 14086566661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16471155600 + 195412441 = 128340^2 + 13979^2 .

It is an emirp because it is prime and its reverse (14086566661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16666568041 - 2¹³ = 16666559849 is a prime.

It is not a weakly prime, because it can be changed into another prime (16666568441) 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, 8333284020 + 8333284021.

It is an arithmetic number, because the mean of its divisors is an integer number (8333284021).

Almost surely, 2^16666568041 is an apocalyptic number.

It is an amenable number.

16666568041 is a deficient number, since it is larger than the sum of its proper divisors (1).

16666568041 is an equidigital number, since it uses as much as digits as its factorization.

16666568041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 16666568041 in words is "sixteen billion, six hundred sixty-six million, five hundred sixty-eight thousand, forty-one".