6906685 has 4 divisors (see below), whose sum is σ = 8288028. Its totient is φ = 5525344.

The previous prime is 6906677. The next prime is 6906689. The reversal of 6906685 is 5866096.

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 1951609 + 4955076 = 1397^2 + 2226^2 .

It is a cyclic number.

It is not a de Polignac number, because 6906685 - 2³ = 6906677 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 (6906689) 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, 690664 + ... + 690673.

It is an arithmetic number, because the mean of its divisors is an integer number (2072007).

Almost surely, 2^6906685 is an apocalyptic number.

It is an amenable number.

6906685 is a deficient number, since it is larger than the sum of its proper divisors (1381343).

6906685 is a wasteful number, since it uses less digits than its factorization.

6906685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381342.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 6906685 is about 2628.0572672604. The cubic root of 6906685 is about 190.4392882728.

The spelling of 6906685 in words is "six million, nine hundred six thousand, six hundred eighty-five".