6681031 has 4 divisors (see below), whose sum is σ = 7635472. Its totient is φ = 5726592.

The previous prime is 6681023. The next prime is 6681041. The reversal of 6681031 is 1301866.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1301866 = 2 ⋅650933.

It is a cyclic number.

It is not a de Polignac number, because 6681031 - 2³ = 6681023 is a prime.

It is a super-2 number, since 2×6681031² = 89272350445922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6680987 and 6681005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477210 + ... + 477223.

It is an arithmetic number, because the mean of its divisors is an integer number (1908868).

Almost surely, 2^6681031 is an apocalyptic number.

6681031 is a deficient number, since it is larger than the sum of its proper divisors (954441).

6681031 is an equidigital number, since it uses as much as digits as its factorization.

6681031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954440.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 6681031 is about 2584.7690419068. The cubic root of 6681031 is about 188.3422823603.

Adding to 6681031 its reverse (1301866), we get a palindrome (7982897).

The spelling of 6681031 in words is "six million, six hundred eighty-one thousand, thirty-one".