663533 has 8 divisors (see below), whose sum is σ = 731808. Its totient is φ = 597744.

The previous prime is 663529. The next prime is 663539. The reversal of 663533 is 335366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 663533 - 2² = 663529 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 663533.

It is not an unprimeable number, because it can be changed into a prime (663539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35 + ... + 1152.

It is an arithmetic number, because the mean of its divisors is an integer number (91476).

2⁶⁶³⁵³³ is an apocalyptic number.

It is an amenable number.

663533 is a deficient number, since it is larger than the sum of its proper divisors (68275).

663533 is a wasteful number, since it uses less digits than its factorization.

663533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243.

The product of its digits is 4860, while the sum is 26.

The square root of 663533 is about 814.5753494920. The cubic root of 663533 is about 87.2209559516.

Adding to 663533 its reverse (335366), we get a palindrome (998899).

The spelling of 663533 in words is "six hundred sixty-three thousand, five hundred thirty-three".