16668982849 has 2 divisors, whose sum is σ = 16668982850. Its totient is φ = 16668982848.

The previous prime is 16668982829. The next prime is 16668982861. The reversal of 16668982849 is 94828986661.

16668982849 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 can be written as a sum of positive squares in only one way, i.e., 11849846449 + 4819136400 = 108857^2 + 69420^2 .

It is a cyclic number.

It is not a de Polignac number, because 16668982849 - 2¹⁹ = 16668458561 is a prime.

It is not a weakly prime, because it can be changed into another prime (16668982829) 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, 8334491424 + 8334491425.

It is an arithmetic number, because the mean of its divisors is an integer number (8334491425).

Almost surely, 2^16668982849 is an apocalyptic number.

It is an amenable number.

16668982849 is a deficient number, since it is larger than the sum of its proper divisors (1).

16668982849 is an equidigital number, since it uses as much as digits as its factorization.

16668982849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71663616, while the sum is 67.

The spelling of 16668982849 in words is "sixteen billion, six hundred sixty-eight million, nine hundred eighty-two thousand, eight hundred forty-nine".