6331663 has 4 divisors (see below), whose sum is σ = 6818728. Its totient is φ = 5844600.

The previous prime is 6331609. The next prime is 6331669. The reversal of 6331663 is 3661336.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6331663 - 2⁹ = 6331151 is a prime.

It is a Duffinian number.

6331663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6331669) 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 3 ways as a sum of consecutive naturals, for example, 243513 + ... + 243538.

It is an arithmetic number, because the mean of its divisors is an integer number (1704682).

Almost surely, 2^6331663 is an apocalyptic number.

6331663 is a deficient number, since it is larger than the sum of its proper divisors (487065).

6331663 is a wasteful number, since it uses less digits than its factorization.

6331663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487064.

The product of its digits is 5832, while the sum is 28.

The square root of 6331663 is about 2516.2795949576. The cubic root of 6331663 is about 185.0003700991. Note that the first 3 decimals are identical.

Adding to 6331663 its reverse (3661336), we get a palindrome (9992999).

The spelling of 6331663 in words is "six million, three hundred thirty-one thousand, six hundred sixty-three".