663530 has 16 divisors (see below), whose sum is σ = 1365120. Its totient is φ = 227472.

The previous prime is 663529. The next prime is 663539. The reversal of 663530 is 35366.

Added to its reverse (35366) it gives a square (698896 = 836²).

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 663496 and 663505.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4670 + ... + 4809.

It is an arithmetic number, because the mean of its divisors is an integer number (85320).

2⁶⁶³⁵³⁰ is an apocalyptic number.

663530 is an abundant number, since it is smaller than the sum of its proper divisors (701590).

It is a weird number, because it is abundant, but not a pseudoperfect number.

663530 is a wasteful number, since it uses less digits than its factorization.

663530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9493.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 663530 is about 814.5735080396. The cubic root of 663530 is about 87.2208245021.

Adding to 663530 its reverse (35366), we get a palindrome (698896).

It can be divided in two parts, 6 and 63530, that added together give a palindrome (63536).

The spelling of 663530 in words is "six hundred sixty-three thousand, five hundred thirty".