6681831 has 8 divisors (see below), whose sum is σ = 9594480. Its totient is φ = 4111872.

The previous prime is 6681817. The next prime is 6681839. The reversal of 6681831 is 1381866.

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

It is not a de Polignac number, because 6681831 - 2¹⁵ = 6649063 is a prime.

It is a super-2 number, since 2×6681831² = 89293731025122, which contains 22 as substring.

6681831 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6681792 and 6681801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681839) 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, 85626 + ... + 85703.

It is an arithmetic number, because the mean of its divisors is an integer number (1199310).

Almost surely, 2^6681831 is an apocalyptic number.

6681831 is a deficient number, since it is larger than the sum of its proper divisors (2912649).

6681831 is a wasteful number, since it uses less digits than its factorization.

6681831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171345.

The product of its digits is 6912, while the sum is 33.

The square root of 6681831 is about 2584.9237899791. The cubic root of 6681831 is about 188.3497995540.

The spelling of 6681831 in words is "six million, six hundred eighty-one thousand, eight hundred thirty-one".