Enter your figures
Enter the values below to calculate your result.
Calculation Results
Based on the figures you entered.
Euler's totient φ(n)
12
Formula
φ(n) = n × ∏(1 − 1/p), over the distinct prime factors p of n.
φ(n) = n × ∏(1 − 1/p), over the distinct prime factors p of n.
How to use this calculator
What to enter
Enter or select the following as requested: Positive integer. Follow the units, valid ranges, examples, and options displayed beside each field.
What the result means
The result follows the number property, divisibility rule, numeral system, or arithmetic operation named by the calculator. Check whether the input must be an integer, the selected base, sign conventions, and whether the output uses decimal, binary, hexadecimal, or another representation.
When to use it
Use this to check a number-theory problem or convert numeric representations. Verify input constraints and preserve the correct base when copying the result into another tool or calculation.