Euler Totient Calculator

The Euler Totient Calculator calculates Eulers Totient, or Phi Function. It calculates the number of numbers less than n that are relatively prime to n. For example, the totient(6) will return 2: since only 3 and 5 are coprime to 6. Enter the number whose totient you want to calculate, click “Calculate” and the answer will appear at Totient.