Which is the outlier in this set of values?

65 70 56 45 59 67 62

Listing the numbers in order,

45 56 59 62 65 67 70

45 is 10 + digits away from the followed number compared to the rest of corresponding digits. As 56 (+3) to get to 59, or 65 (+2) to get to 67. 45 has the highest gap in the sequence.

45 is the outlier