Does anyone know what the five digit number 5DDDD is when it is divisible by 6.

What is the digit D?

I have this so far...

50000/6 = 8333.33 remaining

51111/6 = 8518.5

52222/6 = 8703.66 remaining

53333/6 = 8888.83 remaining

54444/6 = 9074

55555/6 = 9259.166 remaining

56666/6 = 94444.33 remaining

Does this mean that 4 is the only digit of D that is divisible by 5DDD, because it is the only digits that goes into this problem evenly?

I honestly do not know if this is right...these are just my ideas. Any help or ideas would be greatly appreciated.