663597 has 12 divisors (see below), whose sum is σ = 1045824. Its totient is φ = 402120.

The previous prime is 663589. The next prime is 663599. The reversal of 663597 is 795366.

It is a happy number.

663597 is a `hidden beast` number, since 6 + 63 + 597 = 666.

It is not a de Polignac number, because 663597 - 2³ = 663589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3253 + ... + 3450.

It is an arithmetic number, because the mean of its divisors is an integer number (87152).

2⁶⁶³⁵⁹⁷ is an apocalyptic number.

It is an amenable number.

663597 is a deficient number, since it is larger than the sum of its proper divisors (382227).

663597 is a wasteful number, since it uses less digits than its factorization.

663597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6720 (or 6717 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 663597 is about 814.6146328173. The cubic root of 663597 is about 87.2237601134.

Subtracting 663597 from its reverse (795366), we obtain a square (131769 = 363²).

It can be divided in two parts, 66359 and 7, that added together give a palindrome (66366).

The spelling of 663597 in words is "six hundred sixty-three thousand, five hundred ninety-seven".