663330 has 16 divisors (see below), whose sum is σ = 1592064. Its totient is φ = 176880.

The previous prime is 663319. The next prime is 663331. The reversal of 663330 is 33366.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 663297 and 663306.

It is not an unprimeable number, because it can be changed into a prime (663331) by changing a digit.

663330 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11026 + ... + 11085.

It is an arithmetic number, because the mean of its divisors is an integer number (99504).

2⁶⁶³³³⁰ is an apocalyptic number.

663330 is an abundant number, since it is smaller than the sum of its proper divisors (928734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663330 is a wasteful number, since it uses less digits than its factorization.

663330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22121.

The product of its (nonzero) digits is 972, while the sum is 21.

The square root of 663330 is about 814.4507351584. The cubic root of 663330 is about 87.2120603076.

Adding to 663330 its reverse (33366), we get a palindrome (696696).

It can be divided in two parts, 6 and 63330, that added together give a palindrome (63336).

The spelling of 663330 in words is "six hundred sixty-three thousand, three hundred thirty".