6688367 has 4 divisors (see below), whose sum is σ = 7643856. Its totient is φ = 5732880.

The previous prime is 6688351. The next prime is 6688387. The reversal of 6688367 is 7638866.

6688367 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6688367 - 2⁴ = 6688351 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6688307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477734 + ... + 477747.

It is an arithmetic number, because the mean of its divisors is an integer number (1910964).

Almost surely, 2^6688367 is an apocalyptic number.

6688367 is a deficient number, since it is larger than the sum of its proper divisors (955489).

6688367 is an equidigital number, since it uses as much as digits as its factorization.

6688367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955488.

The product of its digits is 290304, while the sum is 44.

The square root of 6688367 is about 2586.1877348715. The cubic root of 6688367 is about 188.4111925620.

The spelling of 6688367 in words is "six million, six hundred eighty-eight thousand, three hundred sixty-seven".