how to compute $O(n^{0.000001})$

Question

this MIT course gives a formula about Big O

$$n^{0.999999} \log n = O(n^{0.999999} \cdot n^{0.000001})$$

going through wiki, i cannot find a similar Big O properties or usages.

how to compute $O(n^{0.000001})$ to get a quantity like $\log n$ ?