6687311 has 8 divisors (see below), whose sum is σ = 6853584. Its totient is φ = 6523200.

The previous prime is 6687293. The next prime is 6687323. The reversal of 6687311 is 1137866.

6687311 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6687311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6687391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6920 + ... + 7826.

It is an arithmetic number, because the mean of its divisors is an integer number (856698).

Almost surely, 2^6687311 is an apocalyptic number.

6687311 is a deficient number, since it is larger than the sum of its proper divisors (166273).

6687311 is a wasteful number, since it uses less digits than its factorization.

6687311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081.

The product of its digits is 6048, while the sum is 32.

The square root of 6687311 is about 2585.9835652997. The cubic root of 6687311 is about 188.4012762057.

The spelling of 6687311 in words is "six million, six hundred eighty-seven thousand, three hundred eleven".