Lots of us know that the ratio between the frequencies of the bass and melody notes in the song is the golden ratio (=1.618...) (which happens to be roughly an octave and a major sixth).
But why did BoC use the golden ratio for this song? I think I've found the answer:
Let's take a pentagram (the symbol of the devil! :O)
The ratio between the red line to the green line is the golden ratio.
As is the ratio between the green side and the blue side.
And the ratio between the blue side and the magenta side!
The golden ratio is everywhere!
(The pentagram is the only star polygon which has this property I believe)
This fits the albums themes of maths, numerology and satanism/the occult, and it explains why BoC used this ratio for this song!
The devil really is in the details I guess
[Reference and maths here for those interested]

