6871664 has 40 divisors (see below), whose sum is σ = 14141952. Its totient is φ = 3227840.

The previous prime is 6871661. The next prime is 6871679. The reversal of 6871664 is 4661786.

It is a super-2 number, since 2×6871664² = 94439532257792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6871661) 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, 25997 + ... + 26259.

Almost surely, 2^6871664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6871664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7070976).

6871664 is an abundant number, since it is smaller than the sum of its proper divisors (7270288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6871664 is a wasteful number, since it uses less digits than its factorization.

6871664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 359 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 6871664 is about 2621.3858929963. The cubic root of 6871664 is about 190.1168625484.

The spelling of 6871664 in words is "six million, eight hundred seventy-one thousand, six hundred sixty-four".