|Morse code||- · · · ·|
|Divider||1, 2, 3, 6|
It is the smallest perfect number : 6 = 1 + 2 + 3 and the factorial of 3 is , which is remarkable because there are no other three numbers whose product is equal to their sum . Likewise is . The equation has the only solution (without permutations ) x = 1, y = 2 and z = 3. Finally is
The cube , (from the Greek) hexahedron or (from the Latin) cube, is one of the five Platonic solids and has six equal faces. A tetrahedron has six edges and an octahedron has six corners. With regular hexagons you can fill a level completely .
The 6 is the two-dimensional kiss number ; H. You can put 6 (same size) coins / discs around another coin / disc of the same size so that all of them touch but no overlaps occur. It is also a Størmer number .
Many crystals form hexagonal (hexagonal) structures, like natural ice , and snowflakes are six-pointed. In nature, the hexagonal shape can be found in the walls of the honeycomb , as there is an almost optimal ratio of wall material to room volume , hexagons cover the entire area .
History and society
In football, the number 6 on the back is the number of the defensive midfielder (also called the sixth position).
Culture, literature, music and intellectual life
6 takes! is a German card game.
Mythology and religion
The hexagram (six-pointed star), a star with six rays made up of two equilateral triangles placed on top of one another, is a religious symbol in some religions, such as Tantric Hinduism and Buddhism . As a Star of David ( Hebrew מגן דוד Magen David , 'Shield of David') is a symbol of Judaism and appears on the flag of Israel . Derived from this, it is a sign of alchemy , in which the overlapping triangles symbolize the elements. As the so-called brewer's star , the hexagram was the guild symbol of brewers and maltsters . The use in pub signs is derived from this.
- David Wells: The Penguin Dictionary of Curious and Interesting Numbers. corr. Edition. Penguin Books, London a. a. 1997, ISBN 0-14-026149-4 .