6679981 has 8 divisors (see below), whose sum is σ = 8328384. Its totient is φ = 5205120.

The previous prime is 6679979. The next prime is 6679993. The reversal of 6679981 is 1899766.

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

It is a cyclic number.

It is not a de Polignac number, because 6679981 - 2¹ = 6679979 is a prime.

It is a super-2 number, since 2×6679981² = 89244292320722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6679901) 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, 43300 + ... + 43453.

It is an arithmetic number, because the mean of its divisors is an integer number (1041048).

Almost surely, 2^6679981 is an apocalyptic number.

It is an amenable number.

6679981 is a deficient number, since it is larger than the sum of its proper divisors (1648403).

6679981 is a wasteful number, since it uses less digits than its factorization.

6679981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86771.

The product of its digits is 163296, while the sum is 46.

The square root of 6679981 is about 2584.5659210010. The cubic root of 6679981 is about 188.3324151329.

It can be divided in two parts, 667 and 9981, that added together give a cube (10648 = 22³).

The spelling of 6679981 in words is "six million, six hundred seventy-nine thousand, nine hundred eighty-one".