6624689 has 8 divisors (see below), whose sum is σ = 6733800. Its totient is φ = 6516736.

The previous prime is 6624671. The next prime is 6624721. The reversal of 6624689 is 9864266.

It can be written as a sum of positive squares in 4 ways, for example, as 3045025 + 3579664 = 1745^2 + 1892^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6624689 - 2⁸ = 6624433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6624619) 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 7 ways as a sum of consecutive naturals, for example, 25649 + ... + 25905.

It is an arithmetic number, because the mean of its divisors is an integer number (841725).

Almost surely, 2^6624689 is an apocalyptic number.

It is an amenable number.

6624689 is a deficient number, since it is larger than the sum of its proper divisors (109111).

6624689 is a wasteful number, since it uses less digits than its factorization.

6624689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579.

The product of its digits is 124416, while the sum is 41.

The square root of 6624689 is about 2573.8471205571. The cubic root of 6624689 is about 187.8113487849.

The spelling of 6624689 in words is "six million, six hundred twenty-four thousand, six hundred eighty-nine".