101 Crew Members

C = 4 U = 3 V = 3 W = 101 X = 17 Y = 7 Z = 37

33101177*37+4 = 4002331

The answer is:

101 Crew Members

Each number is:

C = 4 U = 3 V = 3 W = 101 X = 17 Y = 7 Z = 37 33101177*37+4 = 4002331

My reasoning is:

The age of the captain has to be 64, which is 4 cubed, because 25 is too young to be a grandfather, and 125 is too old to live. The other numbers are just the 6 factors of 4002327, which I found by trial and error on my calculator, though there are probably more efficient ways of doing it!

Edit: Sorry I didn't put my answer into a spoiler, this was my first time on the Puzzling site. I figured it out for the future though!

Edit #2: added my reasoning.

101 Crew Members

C = 4
U = 3
V = 3
W = 101
X = 17
Y = 7
Z = 37

33101177*37+4 = 4002331

101 Crew Members

C = 4 U = 3 V = 3 W = 101 X = 17 Y = 7 Z = 37

33101177*37+4 = 4002331