Euler Phi Function of 166

Example of Euler Phi Function of 2 times Odd Prime

$\phi \left({166}\right) = 82$

where $\phi$ denotes the Euler $\phi$ Function.


Proof

We have that:

$166 = 2 \times 83$


Thus:

\(\ds \phi \left({166}\right)\) \(=\) \(\ds 83 - 1\) Euler Phi Function of 2 times Odd Prime
\(\ds \) \(=\) \(\ds 82\)

$\blacksquare$

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