What are the pin numbers in this picture?
In that image, pin 1 is bottom left, pin 8 is top left
Although your physical IC is missing the "dot" shown in some parts of the datasheet, the thick white line seen in your photo, is another standard marking for the "pin 1 end".
Also this drawing from the datasheet shows another indicator:
Based on the industry standard JEDEC MS-012, there can be an optional "chamfer" along the "pin 1 to pin 4" edge of this package - I have highlighted the relevant details in red on the drawing. I think I can see a darker line on your photo along that edge, which could indicate that the chamfer is present on your IC.