663443 has 6 divisors (see below), whose sum is σ = 729372. Its totient is φ = 603020.

The previous prime is 663437. The next prime is 663463. The reversal of 663443 is 344366.

It is a de Polignac number, because none of the positive numbers 2^k-663443 is a prime.

It is a super-2 number, since 2×663443² = 880313228498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663463) 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 5 ways as a sum of consecutive naturals, for example, 2621 + ... + 2862.

It is an arithmetic number, because the mean of its divisors is an integer number (121562).

2⁶⁶³⁴⁴³ is an apocalyptic number.

663443 is a deficient number, since it is larger than the sum of its proper divisors (65929).

663443 is a wasteful number, since it uses less digits than its factorization.

663443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5505 (or 5494 counting only the distinct ones).

The product of its digits is 5184, while the sum is 26.

The square root of 663443 is about 814.5201041104. The cubic root of 663443 is about 87.2170122939.

The spelling of 663443 in words is "six hundred sixty-three thousand, four hundred forty-three".