6691085 has 4 divisors (see below), whose sum is σ = 8029308. Its totient is φ = 5352864.

The previous prime is 6691079. The next prime is 6691093. The reversal of 6691085 is 5801966.

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 1771561 + 4919524 = 1331^2 + 2218^2 .

It is a cyclic number.

It is not a de Polignac number, because 6691085 - 2⁸ = 6690829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 669104 + ... + 669113.

It is an arithmetic number, because the mean of its divisors is an integer number (2007327).

Almost surely, 2^6691085 is an apocalyptic number.

It is an amenable number.

6691085 is a deficient number, since it is larger than the sum of its proper divisors (1338223).

6691085 is a wasteful number, since it uses less digits than its factorization.

6691085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338222.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 6691085 is about 2586.7131653896. The cubic root of 6691085 is about 188.4367111113.

The spelling of 6691085 in words is "six million, six hundred ninety-one thousand, eighty-five".