663345 has 12 divisors (see below), whose sum is σ = 1149876. Its totient is φ = 353760.

The previous prime is 663331. The next prime is 663349. The reversal of 663345 is 543366.

663345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 484416 + 178929 = 696^2 + 423^2 .

It is not a de Polignac number, because 663345 - 2⁶ = 663281 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7326 + ... + 7415.

It is an arithmetic number, because the mean of its divisors is an integer number (95823).

2⁶⁶³³⁴⁵ is an apocalyptic number.

It is an amenable number.

663345 is a deficient number, since it is larger than the sum of its proper divisors (486531).

663345 is a wasteful number, since it uses less digits than its factorization.

663345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14752 (or 14749 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 663345 is about 814.4599437664. The cubic root of 663345 is about 87.2127176833.

The spelling of 663345 in words is "six hundred sixty-three thousand, three hundred forty-five".