6644618 has 8 divisors (see below), whose sum is σ = 10198848. Its totient is φ = 3245004.

The previous prime is 6644587. The next prime is 6644621. The reversal of 6644618 is 8164466.

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

It is an unprimeable number.

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, 38546 + ... + 38717.

It is an arithmetic number, because the mean of its divisors is an integer number (1274856).

Almost surely, 2^6644618 is an apocalyptic number.

6644618 is a deficient number, since it is larger than the sum of its proper divisors (3554230).

6644618 is a wasteful number, since it uses less digits than its factorization.

6644618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77308.

The product of its digits is 27648, while the sum is 35.

The square root of 6644618 is about 2577.7156553817. The cubic root of 6644618 is about 187.9994907184. Note that the first 3 decimals are identical.

The spelling of 6644618 in words is "six million, six hundred forty-four thousand, six hundred eighteen".