6682

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Number

$6682$ (six thousand, six hundred and eighty-two) is:

$2 \times 13 \times 257$

The $52$nd heptagonal number after $1$, $7$, $18$, $34$, $55$, $81$, $112$, $\ldots$, $5452$, $5688$, $5929$, $6175$, $6426$:

$6682 = \ds \sum_{k \mathop = 1}^{52} \paren {5 k - 4} = \dfrac {52 \paren {5 \times 52 - 3} } 2$

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