3367

Number
$3367$ (three thousand, three hundred and sixty-seven) is:
 * $7 \times 13 \times 37$


 * The $37$th heptagonal number after $1, 7, 18, 34, 55, 81, 112, \ldots, 2205, 2356, 2512, 2673, 2839, 3010, 3186$:
 * $3367 = \displaystyle \sum_{k \mathop = 1}^{37} \left({5 k - 4}\right) = \dfrac {37 \left({5 \times 37 - 3}\right)} 2$