663434533 has 4 divisors (see below), whose sum is σ = 698352160. Its totient is φ = 628516908.

The previous prime is 663434509. The next prime is 663434539. The reversal of 663434533 is 335434366.

663434533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663434533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 663434492 and 663434501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663434539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17458785 + ... + 17458822.

It is an arithmetic number, because the mean of its divisors is an integer number (174588040).

Almost surely, 2^663434533 is an apocalyptic number.

It is an amenable number.

663434533 is a deficient number, since it is larger than the sum of its proper divisors (34917627).

663434533 is a wasteful number, since it uses less digits than its factorization.

663434533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34917626.

The product of its digits is 233280, while the sum is 37.

The square root of 663434533 is about 25757.2229287243. Note that the first 3 decimals coincide. The cubic root of 663434533 is about 872.1664126503.

Adding to 663434533 its reverse (335434366), we get a palindrome (998868899).

It can be divided in two parts, 66343 and 4533, that added together give a triangular number (70876 = T₃₇₆).

The spelling of 663434533 in words is "six hundred sixty-three million, four hundred thirty-four thousand, five hundred thirty-three".