6691135 has 24 divisors (see below), whose sum is σ = 9272016. Its totient is φ = 4596480.

The previous prime is 6691129. The next prime is 6691147. The reversal of 6691135 is 5311966.

It is not a de Polignac number, because 6691135 - 2⁷ = 6691007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6691097 and 6691106.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 19687 + ... + 20023.

It is an arithmetic number, because the mean of its divisors is an integer number (386334).

Almost surely, 2^6691135 is an apocalyptic number.

6691135 is a deficient number, since it is larger than the sum of its proper divisors (2580881).

6691135 is a wasteful number, since it uses less digits than its factorization.

6691135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 372 counting only the distinct ones).

The product of its digits is 4860, while the sum is 31.

The square root of 6691135 is about 2586.7228301463. The cubic root of 6691135 is about 188.4371804827.

The spelling of 6691135 in words is "six million, six hundred ninety-one thousand, one hundred thirty-five".