663213503 has 16 divisors (see below), whose sum is σ = 716867424. Its totient is φ = 611297280.

The previous prime is 663213461. The next prime is 663213527. The reversal of 663213503 is 305312366.

It is a happy number.

It is not a de Polignac number, because 663213503 - 2⁸ = 663213247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663213203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204551 + ... + 207767.

It is an arithmetic number, because the mean of its divisors is an integer number (44804214).

Almost surely, 2^663213503 is an apocalyptic number.

663213503 is a deficient number, since it is larger than the sum of its proper divisors (53653921).

663213503 is a wasteful number, since it uses less digits than its factorization.

663213503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3482.

The product of its (nonzero) digits is 9720, while the sum is 29.

The square root of 663213503 is about 25752.9319301706. The cubic root of 663213503 is about 872.0695448385.

Adding to 663213503 its reverse (305312366), we get a palindrome (968525869).

The spelling of 663213503 in words is "six hundred sixty-three million, two hundred thirteen thousand, five hundred three".