663369 has 16 divisors (see below), whose sum is σ = 1044480. Its totient is φ = 366480.

The previous prime is 663359. The next prime is 663371. The reversal of 663369 is 963366.

663369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 663369 - 2⁷ = 663241 is a prime.

It is a super-2 number, since 2×663369² = 880116860322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (663319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142 + ... + 1160.

It is an arithmetic number, because the mean of its divisors is an integer number (65280).

2⁶⁶³³⁶⁹ is an apocalyptic number.

It is an amenable number.

663369 is a deficient number, since it is larger than the sum of its proper divisors (381111).

663369 is a wasteful number, since it uses less digits than its factorization.

663369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060.

The product of its digits is 17496, while the sum is 33.

The square root of 663369 is about 814.4746773228. The cubic root of 663369 is about 87.2137694638.

The spelling of 663369 in words is "six hundred sixty-three thousand, three hundred sixty-nine".