I can't argue with the math, but intuitively that just seems really small? It means that you can lay down 166,000 $1 bills on the floor of a very small flat?

The square side would be 41 m meaning ~1600 square meters per face, if I read correctly. So quite a large flat.

Oh, the side? That makes sense, I thought 41 sqm.

Sorry, yes, 41m-on-a-side cube, not 41m^2-sided cube. The outermost square-root in the expression takes the area of one side of the cube (which is the area of the dollars, divided by 6 to account for needing to cover the 6 sides of the cube) and pulls it down to the cube's length of one side.

Yeah, you said it correctly, but I'm not a native speaker and brainfarted "41m on a side" into "each side is 41 sqm". I thought "face", rather than "edge".

41 meters is the height of a 13-story building.

A flat with very high ceilings?

Edit: even still 41x41 floorspace is a very large flat.