663533212 has 12 divisors (see below), whose sum is σ = 1161692280. Its totient is φ = 331621136.

The previous prime is 663533203. The next prime is 663533231. The reversal of 663533212 is 212335366.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25762 + ... + 44617.

It is an arithmetic number, because the mean of its divisors is an integer number (96807690).

Almost surely, 2^663533212 is an apocalyptic number.

It is an amenable number.

663533212 is a deficient number, since it is larger than the sum of its proper divisors (498159068).

663533212 is a wasteful number, since it uses less digits than its factorization.

663533212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72740 (or 72738 counting only the distinct ones).

The product of its digits is 19440, while the sum is 31.

The square root of 663533212 is about 25759.1384172685. The cubic root of 663533212 is about 872.2096524067.

Adding to 663533212 its reverse (212335366), we get a palindrome (875868578).

The spelling of 663533212 in words is "six hundred sixty-three million, five hundred thirty-three thousand, two hundred twelve".