Wow! Such a large quantity of unwanted critters indoors is a bit unnerving, isn’t it? But I think this can be resolved with relative ease.

The critters are so small that it’s challenging to say with absolute certainty what they are. But my best guess is that they are springtails, normal inhabitants of a moist, highly organic planting mix. Some kinds jump, others don’t. Fortunately, they don't damage people, pets, or any of your belongings.

My guess is that the container lacks a drain hole or that the plant was watered especially well in order to survive the keeper’s absence. If that’s so, you might set the pot on its side, then sop up the excess moisture with paper towels. A more rapid means of drying it out would be to repot into a pot with a drainhole and which is filled with barely moist potting mix.