Rounding. Probably it extends to infinity as 666.66
66.666 = 3d Lo Shu solfeggio Energetic 396 693 - Watch the Video
3+2=5
Fifth element Searl transformation Lo Shu solfeggio code - Watch the Video
I dedicate my effort's to the Dao in honour of Éliphas Lévi - https://en.wikipedia.org/wiki/Eliphas_Levi
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