2673

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Number

$2673$ (two thousand, six hundred and seventy-three) is:

$3^5 \times 11$

The $33$rd heptagonal number after $1$, $7$, $18$, $34$, $55$, $81$, $112$, $\ldots$, $1525$, $1651$, $1782$, $1918$, $2059$, $2205$, $2356$, $2512$:

$2673 = \ds \sum_{k \mathop = 1}^{33} \paren {5 k - 4} = \dfrac {33 \paren {5 \times 33 - 3} } 2$

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