6688075 has 6 divisors (see below), whose sum is σ = 8293244. Its totient is φ = 5350440.

The previous prime is 6688069. The next prime is 6688079. The reversal of 6688075 is 5708866.

It is not a de Polignac number, because 6688075 - 2¹⁵ = 6655307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6688079) 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 5 ways as a sum of consecutive naturals, for example, 133737 + ... + 133786.

Almost surely, 2^6688075 is an apocalyptic number.

6688075 is a deficient number, since it is larger than the sum of its proper divisors (1605169).

6688075 is a wasteful number, since it uses less digits than its factorization.

6688075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267533 (or 267528 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 6688075 is about 2586.1312805038. The cubic root of 6688075 is about 188.4084506437.

The spelling of 6688075 in words is "six million, six hundred eighty-eight thousand, seventy-five".