6684845 has 8 divisors (see below), whose sum is σ = 8217720. Its totient is φ = 5217280.

The previous prime is 6684833. The next prime is 6684869. The reversal of 6684845 is 5484866.

Added to its reverse (5484866) it gives a triangular number (12169711 = T₄₉₃₃).

It can be written as a sum of positive squares in 4 ways, for example, as 100489 + 6584356 = 317^2 + 2566^2 .

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

It is not a de Polignac number, because 6684845 - 2⁶ = 6684781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16100 + ... + 16509.

It is an arithmetic number, because the mean of its divisors is an integer number (1027215).

Almost surely, 2^6684845 is an apocalyptic number.

It is an amenable number.

6684845 is a deficient number, since it is larger than the sum of its proper divisors (1532875).

6684845 is a wasteful number, since it uses less digits than its factorization.

6684845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32655.

The product of its digits is 184320, while the sum is 41.

The square root of 6684845 is about 2585.5067201614. The cubic root of 6684845 is about 188.3781151939.

Adding to 6684845 its reverse (5484866), we get a triangular number (12169711 = T₄₉₃₃).

The spelling of 6684845 in words is "six million, six hundred eighty-four thousand, eight hundred forty-five".