ref 5645.66 inches it very nearly rings a bell with the Roman foot 11.664 inches. Let me explain 484 Roman feet = 5645.376 inches and the NUMBER 484 can be seen in the Great pyramid in imperial feet.
The number 484 is related to the socket side of the pyramid joined by the approximate for pi 3.1418181818 Fibonacci's value 864/275.
socket side 760.32 imperial feet 9123.84 inches
484 is also related to the caseing base measure 484 x 3.125 (the Babylonian value for pi ) = 1512.5 base 756.25 imperial feet 440 royal cubits of 20.625 inches.
So your number is a coincidence. Although I find it hard to go past 428 indus feet for height and 642 indus feet for base (13.2) I am not sure so your contribution deserves further research.