6. We call numbers whose digit sum is divisible by 5 "5-star numbers," such as: the digit sum of 2021 is $2+0+2+1=5$, and the digit sum of 708 is $7+0+8=15$, so 2021 and 708 are both "5-star numbers". How many "5-star numbers" are there from 1 to 2022? $\qquad$
$404$