663930 has 32 divisors (see below), whose sum is σ = 1771200. Its totient is φ = 176976.

The previous prime is 663907. The next prime is 663937. The reversal of 663930 is 39366.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 663894 and 663903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663937) by changing a digit.

663930 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 15 ways as a sum of consecutive naturals, for example, 960 + ... + 1499.

It is an arithmetic number, because the mean of its divisors is an integer number (55350).

2⁶⁶³⁹³⁰ is an apocalyptic number.

663930 is an abundant number, since it is smaller than the sum of its proper divisors (1107270).

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

663930 is a wasteful number, since it uses less digits than its factorization.

663930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2475 (or 2469 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The square root of 663930 is about 814.8189983058. The cubic root of 663930 is about 87.2383476090.

It can be divided in two parts, 6 and 63930, that added together give a palindrome (63936).

The spelling of 663930 in words is "six hundred sixty-three thousand, nine hundred thirty".