6688085 has 4 divisors (see below), whose sum is σ = 8025708. Its totient is φ = 5350464.

The previous prime is 6688079. The next prime is 6688093. The reversal of 6688085 is 5808866.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1661521 + 5026564 = 1289^2 + 2242^2 .

It is a cyclic number.

It is not a de Polignac number, because 6688085 - 2⁴ = 6688069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 668804 + ... + 668813.

It is an arithmetic number, because the mean of its divisors is an integer number (2006427).

Almost surely, 2^6688085 is an apocalyptic number.

It is an amenable number.

6688085 is a deficient number, since it is larger than the sum of its proper divisors (1337623).

6688085 is a wasteful number, since it uses less digits than its factorization.

6688085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337622.

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 6688085 is about 2586.1332138929. The cubic root of 6688085 is about 188.4085445463.

The spelling of 6688085 in words is "six million, six hundred eighty-eight thousand, eighty-five".