16668351841 has 2 divisors, whose sum is σ = 16668351842. Its totient is φ = 16668351840.

The previous prime is 16668351797. The next prime is 16668351859. The reversal of 16668351841 is 14815386661.

16668351841 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., 16558542400 + 109809441 = 128680^2 + 10479^2 .

It is a cyclic number.

It is not a de Polignac number, because 16668351841 - 2²³ = 16659963233 is a prime.

It is not a weakly prime, because it can be changed into another prime (16668351041) 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, 8334175920 + 8334175921.

It is an arithmetic number, because the mean of its divisors is an integer number (8334175921).

Almost surely, 2^16668351841 is an apocalyptic number.

It is an amenable number.

16668351841 is a deficient number, since it is larger than the sum of its proper divisors (1).

16668351841 is an equidigital number, since it uses as much as digits as its factorization.

16668351841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 49.

The spelling of 16668351841 in words is "sixteen billion, six hundred sixty-eight million, three hundred fifty-one thousand, eight hundred forty-one".