The sequence of 666 appears in the 216th digit of the Fibonacci sequence
619220451666590135228675387863297874269396512
The sum of all the digits in that number add up to 216, as well
6 x 6 x 6 = 216
216 / 3 = 72
72 x 5 = 360
72 x 72 = 5184 Orthogonal key of Solomon Alpha and Omega
51.84º. This is precisely the angle the sides of the pyramid make with respect to the horizontal as indicated by the pre-carved angles present in the pyramid outer casing stones located along the bottom of the Cheops pyramid.
The square root of 5184, is 72 which is the base interior angles of the sublime triangle
72 x 3 is 216 Plato's Number
6 x 6 x 6 = 216
72 x 5 = 360
216 / 2 = 108, interior angle of the pentagon
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The 528 Hz frequency, known in the new age movement for its healing properties is not correct. 528 Hz is the frequency of C/Do based on the natural frequency of A/La 440 Hz. But 440 Hz is not a correct frequency, it is a modern frequency, but historically it’s never been the base frequency used for classical music!
Since millennia, instruments have been tuned with the A/La 432 Hz frequency. Using this frequency as a standard we get 518.4 Hz, not 528 Hz.