6671 has 4 divisors (see below), whose sum is σ = 7632. Its totient is φ = 5712.

The previous prime is 6661. The next prime is 6673. The reversal of 6671 is 1766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1766 = 2 ⋅883.

It is not a de Polignac number, because 6671 - 2⁶ = 6607 is a prime.

It is a pancake number, because a pancake can be divided into 6671 parts by 115 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470 + ... + 483.

It is an arithmetic number, because the mean of its divisors is an integer number (1908).

2⁶⁶⁷¹ is an apocalyptic number.

6671 is a deficient number, since it is larger than the sum of its proper divisors (961).

6671 is an equidigital number, since it uses as much as digits as its factorization.

6671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960.

The product of its digits is 252, while the sum is 20.

The square root of 6671 is about 81.6761899209. The cubic root of 6671 is about 18.8247975172.

The spelling of 6671 in words is "six thousand, six hundred seventy-one".