6688117 has 2 divisors, whose sum is σ = 6688118. Its totient is φ = 6688116.

The previous prime is 6688111. The next prime is 6688127. The reversal of 6688117 is 7118866.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3845521 + 2842596 = 1961^2 + 1686^2 .

It is a cyclic number.

It is not a de Polignac number, because 6688117 - 2³ = 6688109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6688111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3344058 + 3344059.

It is an arithmetic number, because the mean of its divisors is an integer number (3344059).

Almost surely, 2^6688117 is an apocalyptic number.

It is an amenable number.

6688117 is a deficient number, since it is larger than the sum of its proper divisors (1).

6688117 is an equidigital number, since it uses as much as digits as its factorization.

6688117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 37.

The square root of 6688117 is about 2586.1394007284. The cubic root of 6688117 is about 188.4088450341.

The spelling of 6688117 in words is "six million, six hundred eighty-eight thousand, one hundred seventeen".