6699911 has 4 divisors (see below), whose sum is σ = 6784800. Its totient is φ = 6615024.

The previous prime is 6699907. The next prime is 6699919. The reversal of 6699911 is 1199966.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1199966 = 2 ⋅599983.

It is a cyclic number.

It is not a de Polignac number, because 6699911 - 2² = 6699907 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6699919) 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, 42326 + ... + 42483.

It is an arithmetic number, because the mean of its divisors is an integer number (1696200).

Almost surely, 2^6699911 is an apocalyptic number.

6699911 is a deficient number, since it is larger than the sum of its proper divisors (84889).

6699911 is an equidigital number, since it uses as much as digits as its factorization.

6699911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84888.

The product of its digits is 26244, while the sum is 41.

The square root of 6699911 is about 2588.4186292020. The cubic root of 6699911 is about 188.5195283565.

Subtracting from 6699911 its reverse (1199966), we obtain a palindrome (5499945).

The spelling of 6699911 in words is "six million, six hundred ninety-nine thousand, nine hundred eleven".