Euler's Totient φ(n) Calculator - Online Phi Function
www.dcode.fr › euler-totientEuler Phi totient calculator computes the value of Phi(n) in several ways, the best known formula is $$ \varphi(n) = n \prod_{p \mid n} \left( 1 - \frac{1}{p} \right) $$ where $ p $ is a prime factor which divides $ n $. To calculate the value of the Euler indicator/totient, the first step is to find the prime factor decomposition of $ n $.