6699149 has 4 divisors (see below), whose sum is σ = 6708060. Its totient is φ = 6690240.

The previous prime is 6699103. The next prime is 6699151. The reversal of 6699149 is 9419966.

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 3062500 + 3636649 = 1750^2 + 1907^2 .

It is a cyclic number.

It is not a de Polignac number, because 6699149 - 2²⁰ = 5650573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6699349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3212 + ... + 4869.

It is an arithmetic number, because the mean of its divisors is an integer number (1677015).

Almost surely, 2^6699149 is an apocalyptic number.

It is an amenable number.

6699149 is a deficient number, since it is larger than the sum of its proper divisors (8911).

6699149 is an equidigital number, since it uses as much as digits as its factorization.

6699149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8910.

The product of its digits is 104976, while the sum is 44.

The square root of 6699149 is about 2588.2714308975. The cubic root of 6699149 is about 188.5123811309.

The spelling of 6699149 in words is "six million, six hundred ninety-nine thousand, one hundred forty-nine".