Let $U_n$ be $U(\Bbb Z_n)$, the multiplicative group of integers modulo $n$.
Given such group and also we know it is a cyclic group the question is:
How many generators does it have?
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Welcome to MSE. What is a oiler group. – José Carlos Santos Dec 24 '19 at 12:31
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Un = Euler’s group is Un = U(Zn) with mult module n – Neo182 Dec 24 '19 at 12:33
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3Really? Then edit your question and add it to it. – José Carlos Santos Dec 24 '19 at 12:34
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$\varphi(\varphi (n))$, where $\varphi $ is Euler's totient function. – Dec 25 '19 at 05:18