When a rectangle frames a parabola such that a side of the rectangle is parallel to the parabola's axis of symmetry, the parabola divides the rectangle into regions whose areas are in the ratio $2$ to $1$.  How many integer values of $k$ are there such that $0<k\leq 2007$ and the area between the parabola $y=k-x^2$ and the $x$-axis is an integer?

[asy]
import graph;
size(300);
defaultpen(linewidth(0.8)+fontsize(10));
real k=1.5;
real endp=sqrt(k);
real f(real x) {
return k-x^2;
}
path parabola=graph(f,-endp,endp)--cycle;
filldraw(parabola, lightgray);
draw((endp,0)--(endp,k)--(-endp,k)--(-endp,0));
label("Region I", (0,2*k/5));
label("Box II", (51/64*endp,13/16*k));
label("area(I) = $\frac23$\,area(II)",(5/3*endp,k/2));
[/asy]
1. We need to find the integer values of \( k \) such that \( 0 < k \leq 2007 \) and the area between the parabola \( y = k - x^2 \) and the \( x \)-axis is an integer.

2. The area between the parabola \( y = k - x^2 \) and the \( x \)-axis can be found by integrating the function from \( -\sqrt{k} \) to \( \sqrt{k} \):
   \[
   \text{Area} = \int_{-\sqrt{k}}^{\sqrt{k}} (k - x^2) \, dx
   \]

3. Compute the integral:
   \[
   \text{Area} = \int_{-\sqrt{k}}^{\sqrt{k}} k \, dx - \int_{-\sqrt{k}}^{\sqrt{k}} x^2 \, dx
   \]

4. Evaluate the first integral:
   \[
   \int_{-\sqrt{k}}^{\sqrt{k}} k \, dx = k \left[ x \right]_{-\sqrt{k}}^{\sqrt{k}} = k \left( \sqrt{k} - (-\sqrt{k}) \right) = k \cdot 2\sqrt{k} = 2k\sqrt{k}
   \]

5. Evaluate the second integral:
   \[
   \int_{-\sqrt{k}}^{\sqrt{k}} x^2 \, dx = \left[ \frac{x^3}{3} \right]_{-\sqrt{k}}^{\sqrt{k}} = \frac{(\sqrt{k})^3}{3} - \frac{(-\sqrt{k})^3}{3} = \frac{k^{3/2}}{3} - \left( -\frac{k^{3/2}}{3} \right) = \frac{2k^{3/2}}{3}
   \]

6. Combine the results:
   \[
   \text{Area} = 2k\sqrt{k} - \frac{2k^{3/2}}{3} = \frac{6k\sqrt{k}}{3} - \frac{2k^{3/2}}{3} = \frac{6k\sqrt{k} - 2k^{3/2}}{3} = \frac{4k^{3/2}}{3}
   \]

7. For the area to be an integer, \( \frac{4k^{3/2}}{3} \) must be an integer. This implies that \( k^{3/2} \) must be a multiple of \( \frac{3}{4} \).

8. Since \( k \) must be a perfect square for \( \sqrt{k} \) to be an integer, let \( k = n^2 \). Then \( k^{3/2} = (n^2)^{3/2} = n^3 \).

9. For \( \frac{4n^3}{3} \) to be an integer, \( n^3 \) must be a multiple of 3. Therefore, \( n \) must be a multiple of 3.

10. Let \( n = 3m \). Then \( k = (3m)^2 = 9m^2 \).

11. We need \( 0 < 9m^2 \leq 2007 \). Solving for \( m \):
    \[
    0 < m^2 \leq \frac{2007}{9} \approx 223
    \]
    \[
    0 < m \leq \sqrt{223} \approx 14.93
    \]

12. Since \( m \) must be an integer, \( m \) can take values from 1 to 14. Therefore, there are 14 possible values for \( m \).

The final answer is \(\boxed{14}\).