264

Number
$264$ (two hundred and sixty-four) is:


 * $2^3 \times 3 \times 11$


 * The $15$th integer $n$ after $1, 3, 15, 30, 35, 56, 70, 78, 105, 140, 168, 190, 210, 248$ with the property that $\tau \left({n}\right) \mathrel \backslash \phi \left({n}\right) \mathrel \backslash \sigma \left({n}\right)$:
 * $\tau \left({264}\right) = 16$, $\phi \left({264}\right) = 80$, $\sigma \left({264}\right) = 720$


 * The $2$nd non-palindromic square root after $26$ of a palindromic square:
 * $264^2 = 69 \, 696$