660

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Number

$660$ (six hundred and sixty) is:

$2^2 \times 3 \times 5 \times 11$

The $40$th highly abundant number after $1$, $2$, $3$, $4$, $6$, $8$, $10$, $\ldots$, $210$, $216$, $240$, $288$, $300$, $336$, $360$, $420$, $480$, $504$, $600$, $630$:

$\map {\sigma_1} {660} = 2016$

Arithmetic Functions on $660$

\(\ds \map {\sigma_1} { 660 }\)

\(=\)

\(\ds 2016\)

$\sigma_1$ of $660$

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