The Euler's totient function is a function that counts the number of positive integers less than or equal to n that are coprime to n. It is denoted by φ(n) and is defined as φ(n) = {k|1≤k≤n, gcd(k,n)=1}.
The Euler's totient function is a function that counts the number of positive integers less than or equal to n that are coprime to n. It is denoted by φ(n) and is defined as φ(n) = {k|1≤k≤n, gcd(k,n)=1}.