http://www.astrology-numerology.com/num-intensity.html
Average. The average of one 7 gives the abilities to analyze, investigate, and learn easily. You have a questioning mind which stimulates reading, study, observation and development of the mind. You have the ability to question and discriminate constructively.
No 7s. The qualities of the 7 are missing( in many names) making the mysteries of life more difficult to understand and grasp. Without a 7 in your name, you may be less cautious, less analytic, and perhaps not the top of the class when it comes to study. You are less apt to be overly skeptical and demanding of those around you.
Many 7s. If you are that rare individual who has many 7s in your name, it may be said that you "dance to a different drummer." Your mind is highly scientific and proof oriented. You take nothing on faith. Many of your ideas will be considered odd and out of step with most of the world around you. Emotions are very controlled.
this reference is referring to our names , but can lay meaning to the numbers within a date of birth as well