6644542 has 8 divisors (see below), whose sum is σ = 10210032. Its totient is φ = 3241200.

The previous prime is 6644537. The next prime is 6644543. The reversal of 6644542 is 2454466.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644543) 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, 40434 + ... + 40597.

It is an arithmetic number, because the mean of its divisors is an integer number (1276254).

Almost surely, 2^6644542 is an apocalyptic number.

6644542 is a deficient number, since it is larger than the sum of its proper divisors (3565490).

6644542 is a wasteful number, since it uses less digits than its factorization.

6644542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81074.

The product of its digits is 23040, while the sum is 31.

The square root of 6644542 is about 2577.7009136050. The cubic root of 6644542 is about 187.9987739470.

The spelling of 6644542 in words is "six million, six hundred forty-four thousand, five hundred forty-two".