266

Number
$266$ (two hundred and sixty-six) is:


 * $2 \times 7 \times 19$


 * The $25$th noncototient after $10, 26, 34, 50, \ldots, 206, 218, 222, 232, 244, 260$:
 * $\nexists m \in \Z_{>0}: m - \phi \left({m}\right) = 266$
 * where $\phi \left({m}\right)$ denotes the Euler $\phi$ function


 * The $12$th inconsummate number after $62, 63, 65, 75, 84, 95, 161, 173, 195, 216, 261$:
 * $\nexists n \in \Z_{>0}: n = 266 \times s_{10} \left({n}\right)$