1679
1681
The Number 1680: Properties and Meanings
Prime Factors
of
1680
=
2
x
2
x
2
x
2
x
3
x
5
x
7
.
1680
is an
Octagonal Number
.
The Year 1680 AD
In the year
1680
AD Athanasius Kircher died.(
Esoteric History
)
1679
1681