16685441 has 2 divisors, whose sum is σ = 16685442. Its totient is φ = 16685440.

The previous prime is 16685437. The next prime is 16685447. The reversal of 16685441 is 14458661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15484225 + 1201216 = 3935^2 + 1096^2 .

It is a cyclic number.

It is not a de Polignac number, because 16685441 - 2² = 16685437 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (16685447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8342720 + 8342721.

It is an arithmetic number, because the mean of its divisors is an integer number (8342721).

Almost surely, 2^16685441 is an apocalyptic number.

It is an amenable number.

16685441 is a deficient number, since it is larger than the sum of its proper divisors (1).

16685441 is an equidigital number, since it uses as much as digits as its factorization.

16685441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 35.

The square root of 16685441 is about 4084.7816343105. The cubic root of 16685441 is about 255.5323544645.

The spelling of 16685441 in words is "sixteen million, six hundred eighty-five thousand, four hundred forty-one".