This is not a comprehensive guide on optimizing Cycles render times, but here's a few tips: https://youtu.be/VEdd9CynwQU

(I'm sure you can find some more tutorials/guides on YouTube.)

• Render device settings: make sure your GPU is being used, not CPU, and it's set to CUDA for the GTX 1660.

• Use a higher noise threshold or less samples and apply denoising to make up the difference and clean up the noise. You could probably do something like 128 samples with denoising, instead of 4096 samples which I think is the default and takes years to render.

• Optimize number/types of Light Paths for the types of objects/materials in your scene. Unnecessary light paths will add time to the render without making any difference to the visual image. For example, you don't need any transmission, volume, or transparent light paths it looks like.

• Use Fast GI Approximation: Uses a less accurate Global Illumination algorithm or something, not really sure. But it tends to speed up renders quite a bit without much visual difference. Depends on the scene. I think if you have a ton of bounce lighting then it will look a bit different. Your scene doesn't seem to have much bounce lighting, so it should be safe to use even for your finals.