6604432551 has 16 divisors (see below), whose sum is σ = 9825292800. Its totient is φ = 4384528344.

The previous prime is 6604432511. The next prime is 6604432573. The reversal of 6604432551 is 1552344066.

6604432551 is a `hidden beast` number, since 6 + 60 + 4 + 43 + 2 + 551 = 666.

It is not a de Polignac number, because 6604432551 - 2⁶ = 6604432487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6604432511) 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 15 ways as a sum of consecutive naturals, for example, 505281 + ... + 518186.

It is an arithmetic number, because the mean of its divisors is an integer number (614080800).

Almost surely, 2^6604432551 is an apocalyptic number.

6604432551 is a deficient number, since it is larger than the sum of its proper divisors (3220860249).

6604432551 is a wasteful number, since it uses less digits than its factorization.

6604432551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023715 (or 1023709 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 6604432551 is about 81267.6599330878. The cubic root of 6604432551 is about 1876.1972845891.

The spelling of 6604432551 in words is "six billion, six hundred four million, four hundred thirty-two thousand, five hundred fifty-one".