6. (5 points) The sum of all digits in the product of $2 \times 3 \times 5 \times 7 \times 11 \times 13 \times 17$ is $\qquad$
【Solution】Solution: According to the problem, we know: $2 \times 3 \times 5 \times 7 \times 11 \times 13 \times 17$ can be split into three parts: $2 \times 5=10 ; 3 \times 17$ $=51 ; 7 \times 13 \times 17=1001$; we get $51 \times 10=510 ; 510 \times 1001=510510$ (multiplying a three-digit number by 1001, rewrite this three-digit number twice); the sum of all digits $=5+1+0+5+1+0=12$; therefore, the answer is: 12 .