What is the asymptotic order (in terms of $n$) of the number of solution to the equations $\phi(x) = n$, where $x$ can be any integer and $n$ is given?
For example the solutions to $phi(x) = 36$ are $37, 57, 63, 74, 76, 108, 114, 126$.
2026-03-25 06:04:16.1774418656
Order of the number of solution to the equation $\phi(x) = n$
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