Composite number In base 10, twenty-seven is the first composite number not evenly divisible by any of its digits. Share this: Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn Share on Facebook (Opens in new window) Facebook Share on Tumblr (Opens in new window) Tumblr Share on Pocket (Opens in new window) Pocket Share on Telegram (Opens in new window) Telegram Share on WhatsApp (Opens in new window) WhatsApp Related 0 Assorted 27, composite number