6671813 has 4 divisors (see below), whose sum is σ = 6680268. Its totient is φ = 6663360.

The previous prime is 6671809. The next prime is 6671839. The reversal of 6671813 is 3181766.

6671813 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4592449 + 2079364 = 2143^2 + 1442^2 .

It is a cyclic number.

It is not a de Polignac number, because 6671813 - 2² = 6671809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6671813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6671893) 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 3 ways as a sum of consecutive naturals, for example, 2906 + ... + 4667.

It is an arithmetic number, because the mean of its divisors is an integer number (1670067).

Almost surely, 2^6671813 is an apocalyptic number.

It is an amenable number.

6671813 is a deficient number, since it is larger than the sum of its proper divisors (8455).

6671813 is an equidigital number, since it uses as much as digits as its factorization.

6671813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8454.

The product of its digits is 6048, while the sum is 32.

The square root of 6671813 is about 2582.9852883824. The cubic root of 6671813 is about 188.2556221708.

The spelling of 6671813 in words is "six million, six hundred seventy-one thousand, eight hundred thirteen".