206 (two hundred [and] six) is the
natural number following
205 and preceding
207.
In mathematics
206 is both a
nontotient and a
noncototient.[1] 206 is an
untouchable number.[2] It is the lowest positive integer (when written in English as "two hundred and six") to employ all of the vowels once only, not including
Y. The other numbers sharing this property are 230, 250, 260, 602, 640, 5000, 8000, 9000, 26,000, 80,000 and 90,000.[3] 206 and 207 form the second pair of consecutive numbers (after 14 and 15) whose
sums of divisors are equal.[4] There are exactly 206 different
linear forests on five labeled nodes,[5] and exactly 206
regular semigroups of order four up to isomorphism and anti-isomorphism.[6]
In science
There are 206 bones in the typical adult human body.[7]