6684891 has 8 divisors (see below), whose sum is σ = 8930304. Its totient is φ = 4448040.

The previous prime is 6684869. The next prime is 6684907. The reversal of 6684891 is 1984866.

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

It is not a de Polignac number, because 6684891 - 2¹⁰ = 6683867 is a prime.

6684891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6684091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15 + ... + 3656.

It is an arithmetic number, because the mean of its divisors is an integer number (1116288).

Almost surely, 2^6684891 is an apocalyptic number.

6684891 is a deficient number, since it is larger than the sum of its proper divisors (2245413).

6684891 is a wasteful number, since it uses less digits than its factorization.

6684891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4281.

The product of its digits is 82944, while the sum is 42.

The square root of 6684891 is about 2585.5156158879. The cubic root of 6684891 is about 188.3785472844.

The spelling of 6684891 in words is "six million, six hundred eighty-four thousand, eight hundred ninety-one".