6684381 has 24 divisors (see below), whose sum is σ = 10614240. Its totient is φ = 4020000.

The previous prime is 6684373. The next prime is 6684443. The reversal of 6684381 is 1834866.

It is a happy number.

It is not a de Polignac number, because 6684381 - 2³ = 6684373 is a prime.

It is a super-2 number, since 2×6684381² = 89361898706322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6684341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24715 + ... + 24983.

It is an arithmetic number, because the mean of its divisors is an integer number (442260).

Almost surely, 2^6684381 is an apocalyptic number.

It is an amenable number.

6684381 is a deficient number, since it is larger than the sum of its proper divisors (3929859).

6684381 is a wasteful number, since it uses less digits than its factorization.

6684381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537 (or 534 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 6684381 is about 2585.4169876444. The cubic root of 6684381 is about 188.3737566053.

The spelling of 6684381 in words is "six million, six hundred eighty-four thousand, three hundred eighty-one".