Things aren’t going well for Cat Stevens on the planet, ah, polyethylene. Critics keep asking: would you buy a used I Ching from this man? Since Tea for the Tillerman, affirmation has been doubtful. Never a deep thinker and rarely a master of words, Stevens has now turned to the “majik” of numerology, only to have the melodies disappear down the decimal point. In fact, “Call Me Zero” would have been a perfect title for Numbers, an album so breathtakingly stupid that even the most loyal fan could count its merits without using any of the fingers on either hand.