6678381 has 12 divisors (see below), whose sum is σ = 9225632. Its totient is φ = 4297104.

The previous prime is 6678317. The next prime is 6678383. The reversal of 6678381 is 1838766.

It is not a de Polignac number, because 6678381 - 2⁶ = 6678317 is a prime.

It is a super-2 number, since 2×6678381² = 89201545562322, which contains 22 as substring.

It is a Duffinian number.

6678381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6678383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1200 + ... + 3846.

Almost surely, 2^6678381 is an apocalyptic number.

It is an amenable number.

6678381 is a deficient number, since it is larger than the sum of its proper divisors (2547251).

6678381 is a wasteful number, since it uses less digits than its factorization.

6678381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2708 (or 2679 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 6678381 is about 2584.2563727308. The cubic root of 6678381 is about 188.3173773693.

The spelling of 6678381 in words is "six million, six hundred seventy-eight thousand, three hundred eighty-one".