663135232 has 22 divisors (see below), whose sum is σ = 1325624918. Its totient is φ = 331567104.

The previous prime is 663135227. The next prime is 663135233. The reversal of 663135232 is 232531366.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 634233856 + 28901376 = 25184^2 + 5376^2 .

It is a junction number, because it is equal to n+sod(n) for n = 663135194 and 663135203.

It is not an unprimeable number, because it can be changed into a prime (663135233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322773 + ... + 324820.

Almost surely, 2^663135232 is an apocalyptic number.

It is an amenable number.

663135232 is a deficient number, since it is larger than the sum of its proper divisors (662489686).

663135232 is an equidigital number, since it uses as much as digits as its factorization.

663135232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647613 (or 647595 counting only the distinct ones).

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

The square root of 663135232 is about 25751.4122331184. The cubic root of 663135232 is about 872.0352369118.

Adding to 663135232 its reverse (232531366), we get a palindrome (895666598).

The spelling of 663135232 in words is "six hundred sixty-three million, one hundred thirty-five thousand, two hundred thirty-two".