6671811 has 4 divisors (see below), whose sum is σ = 8895752. Its totient is φ = 4447872.

The previous prime is 6671809. The next prime is 6671839. The reversal of 6671811 is 1181766.

It is a happy number.

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

It is not a de Polignac number, because 6671811 - 2¹ = 6671809 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6671801) 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, 1111966 + ... + 1111971.

It is an arithmetic number, because the mean of its divisors is an integer number (2223938).

Almost surely, 2^6671811 is an apocalyptic number.

6671811 is a deficient number, since it is larger than the sum of its proper divisors (2223941).

6671811 is a wasteful number, since it uses less digits than its factorization.

6671811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223940.

The product of its digits is 2016, while the sum is 30.

The square root of 6671811 is about 2582.9849012335. The cubic root of 6671811 is about 188.2556033598.

The spelling of 6671811 in words is "six million, six hundred seventy-one thousand, eight hundred eleven".