663245 has 16 divisors (see below), whose sum is σ = 898560. Its totient is φ = 465600.

The previous prime is 663241. The next prime is 663263. The reversal of 663245 is 542366.

It is not a de Polignac number, because 663245 - 2² = 663241 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 (663241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1511 + ... + 1899.

It is an arithmetic number, because the mean of its divisors is an integer number (56160).

2⁶⁶³²⁴⁵ is an apocalyptic number.

It is an amenable number.

663245 is a deficient number, since it is larger than the sum of its proper divisors (235315).

663245 is a wasteful number, since it uses less digits than its factorization.

663245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436.

The product of its digits is 4320, while the sum is 26.

The square root of 663245 is about 814.3985510793. The cubic root of 663245 is about 87.2083349915.

The spelling of 663245 in words is "six hundred sixty-three thousand, two hundred forty-five".