366

Number
$366$ (three hundred and sixty-six) is:


 * $2 \times 3 \times 61$


 * The $4$th integer solution to $\map {\sigma_1} n = \map {\sigma_1} {n + 2}$ after $33$, $54$, $284$:
 * $\map {\sigma_1} {366} = 744 = \map {\sigma_1} {368}$


 * The $37$th noncototient after $10$, $26$, $34$, $50$, $\ldots$, $290$, $292$, $298$, $310$, $326$, $340$, $344$, $346$, $362$:
 * $\nexists m \in \Z_{>0}: m - \map \phi m = 366$
 * where $\map \phi m$ denotes the Euler $\phi$ function


 * The $39$th sphenic number after $30$, $42$, $66$, $70$, $\ldots$, $290$, $310$, $318$, $322$, $345$, $354$, $357$:
 * $366 = 2 \times 3 \times 61$