616

Number
$616$ (six hundred and sixteen) is:
 * $2^3 \times 7 \times 11$


 * The $16$th heptagonal number after $1, 7, 18, 34, 55, 81, 112, 148, 189, 235, 286, 342, 403, 469, 540$:
 * $616 = \displaystyle \sum_{k \mathop = 1}^{16} \left({5 k - 4}\right) = \dfrac {16 \left({5 \times 16 - 3}\right)} 2$