6684861 has 8 divisors (see below), whose sum is σ = 8995360. Its totient is φ = 4415472.

The previous prime is 6684833. The next prime is 6684869. The reversal of 6684861 is 1684866.

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

It is not a de Polignac number, because 6684861 - 2¹³ = 6676669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6684869) 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, 9895 + ... + 10548.

It is an arithmetic number, because the mean of its divisors is an integer number (1124420).

Almost surely, 2^6684861 is an apocalyptic number.

It is an amenable number.

6684861 is a deficient number, since it is larger than the sum of its proper divisors (2310499).

6684861 is a wasteful number, since it uses less digits than its factorization.

6684861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20555.

The product of its digits is 55296, while the sum is 39.

The square root of 6684861 is about 2585.5098143306. The cubic root of 6684861 is about 188.3782654865.

The spelling of 6684861 in words is "six million, six hundred eighty-four thousand, eight hundred sixty-one".