6694809911 has 4 divisors (see below), whose sum is σ = 6695488800. Its totient is φ = 6694131024.

The previous prime is 6694809907. The next prime is 6694809917. The reversal of 6694809911 is 1199084966.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6694809911 - 2² = 6694809907 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 (6694809917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324431 + ... + 344448.

It is an arithmetic number, because the mean of its divisors is an integer number (1673872200).

Almost surely, 2^6694809911 is an apocalyptic number.

6694809911 is a deficient number, since it is larger than the sum of its proper divisors (678889).

6694809911 is a wasteful number, since it uses less digits than its factorization.

6694809911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678888.

The product of its (nonzero) digits is 839808, while the sum is 53.

The square root of 6694809911 is about 81821.8180621770. The cubic root of 6694809911 is about 1884.7167204651.

The spelling of 6694809911 in words is "six billion, six hundred ninety-four million, eight hundred nine thousand, nine hundred eleven".