Euler Phi Function of 146

Example of Euler Phi Function of 2 times Odd Prime

$\map \phi {146} = 72$

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

Proof

We have that:

$146 = 2 \times 73$

Thus:

\(\ds \map \phi {146}\)

\(=\)

\(\ds 73 - 1\)

Euler Phi Function of 2 times Odd Prime

\(\ds \)

\(=\)

\(\ds 72\)

$\blacksquare$