6644199 has 8 divisors (see below), whose sum is σ = 9144832. Its totient is φ = 4286520.

The previous prime is 6644191. The next prime is 6644227. The reversal of 6644199 is 9914466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6644199 - 2³ = 6644191 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 (6644191) 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 7 ways as a sum of consecutive naturals, for example, 35629 + ... + 35814.

It is an arithmetic number, because the mean of its divisors is an integer number (1143104).

Almost surely, 2^6644199 is an apocalyptic number.

6644199 is a deficient number, since it is larger than the sum of its proper divisors (2500633).

6644199 is a wasteful number, since it uses less digits than its factorization.

6644199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71477.

The product of its digits is 46656, while the sum is 39.

The square root of 6644199 is about 2577.6343805901. The cubic root of 6644199 is about 187.9955389767.

The spelling of 6644199 in words is "six million, six hundred forty-four thousand, one hundred ninety-nine".