PHI(φ) is an irrational, non-terminating number as PI(π), but its significance is far more than PI(π) ;
Π = 3.14159265359…(pi)
Φ = 1.61803398874…(phi)
The Golden Ratio (phi = φ) is often called The Most Beautiful Number In The Universe.
The reason φ is so extraordinary is because it can be visualized almost everywhere, starting from geometry to the human body itself!
The Renaissance Artists called this “The Divine Proportion” or “The Golden Ratio”.