663553 is nontrivially palindromic in base 15.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-663553 is a prime.
It is a Duffinian number.
663553 is a lucky number.
2663553 is an apocalyptic number.
It is an amenable number.
663553 is a wasteful number, since it uses less digits than its factorization.
663553 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 527.
The square root of 663553 is about 814.5876257346. The cubic root of 663553 is about 87.2218322715.
The spelling of 663553 in words is "six hundred sixty-three thousand, five hundred fifty-three".