6644091 has 16 divisors (see below), whose sum is σ = 9555840. Its totient is φ = 4092480.

The previous prime is 6644087. The next prime is 6644101. The reversal of 6644091 is 1904466.

It is not a de Polignac number, because 6644091 - 2² = 6644087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6644081) 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 15 ways as a sum of consecutive naturals, for example, 916 + ... + 3758.

It is an arithmetic number, because the mean of its divisors is an integer number (597240).

Almost surely, 2^6644091 is an apocalyptic number.

6644091 is a deficient number, since it is larger than the sum of its proper divisors (2911749).

6644091 is a wasteful number, since it uses less digits than its factorization.

6644091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 6644091 is about 2577.6134310637. The cubic root of 6644091 is about 187.9945203624.

The spelling of 6644091 in words is "six million, six hundred forty-four thousand, ninety-one".