663009 has 8 divisors (see below), whose sum is σ = 898752. Its totient is φ = 434640.

The previous prime is 663007. The next prime is 663031. The reversal of 663009 is 900366.

663009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 663009 - 2¹ = 663007 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 663009.

It is not an unprimeable number, because it can be changed into a prime (663001) 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, 1629 + ... + 1994.

It is an arithmetic number, because the mean of its divisors is an integer number (112344).

2⁶⁶³⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

663009 is a deficient number, since it is larger than the sum of its proper divisors (235743).

663009 is a wasteful number, since it uses less digits than its factorization.

663009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 663009 is about 814.2536459851. The cubic root of 663009 is about 87.1979900920.

The spelling of 663009 in words is "six hundred sixty-three thousand, nine".