6441663 has 16 divisors (see below), whose sum is σ = 8908416. Its totient is φ = 4137120.

The previous prime is 6441653. The next prime is 6441697. The reversal of 6441663 is 3661446.

It is not a de Polignac number, because 6441663 - 2⁴ = 6441647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6441663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6441653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14320 + ... + 14762.

It is an arithmetic number, because the mean of its divisors is an integer number (556776).

Almost surely, 2^6441663 is an apocalyptic number.

6441663 is a deficient number, since it is larger than the sum of its proper divisors (2466753).

6441663 is a wasteful number, since it uses less digits than its factorization.

6441663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614.

The product of its digits is 10368, while the sum is 30.

The square root of 6441663 is about 2538.0431438413. The cubic root of 6441663 is about 186.0655625042.

The spelling of 6441663 in words is "six million, four hundred forty-one thousand, six hundred sixty-three".