16667743417109 has 2 divisors, whose sum is σ = 16667743417110. Its totient is φ = 16667743417108.

The previous prime is 16667743416991. The next prime is 16667743417163. The reversal of 16667743417109 is 90171434776661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15744404998084 + 923338419025 = 3967922^2 + 960905^2 .

It is a cyclic number.

It is not a de Polignac number, because 16667743417109 - 2²⁰ = 16667742368533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16667743417189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8333871708554 + 8333871708555.

It is an arithmetic number, because the mean of its divisors is an integer number (8333871708555).

Almost surely, 2^{16667743417109} is an apocalyptic number.

It is an amenable number.

16667743417109 is a deficient number, since it is larger than the sum of its proper divisors (1).

16667743417109 is an equidigital number, since it uses as much as digits as its factorization.

16667743417109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32006016, while the sum is 62.

The spelling of 16667743417109 in words is "sixteen trillion, six hundred sixty-seven billion, seven hundred forty-three million, four hundred seventeen thousand, one hundred nine".