6604043663 has 4 divisors (see below), whose sum is σ = 7547478480. Its totient is φ = 5660608848.

The previous prime is 6604043639. The next prime is 6604043683. The reversal of 6604043663 is 3663404066.

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 6604043663 - 2¹⁰ = 6604042639 is a prime.

It is a super-2 number, since 2×6604043663² = 87226785405620915138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6604043603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471717398 + ... + 471717411.

It is an arithmetic number, because the mean of its divisors is an integer number (1886869620).

Almost surely, 2^6604043663 is an apocalyptic number.

6604043663 is a deficient number, since it is larger than the sum of its proper divisors (943434817).

6604043663 is an equidigital number, since it uses as much as digits as its factorization.

6604043663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943434816.

The product of its (nonzero) digits is 186624, while the sum is 38.

The square root of 6604043663 is about 81265.2672609892. The cubic root of 6604043663 is about 1876.1604585673.

The spelling of 6604043663 in words is "six billion, six hundred four million, forty-three thousand, six hundred sixty-three".