6644172 has 12 divisors (see below), whose sum is σ = 15503096. Its totient is φ = 2214720.

The previous prime is 6644159. The next prime is 6644177. The reversal of 6644172 is 2714466.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644177) 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, 276829 + ... + 276852.

Almost surely, 2^6644172 is an apocalyptic number.

It is an amenable number.

6644172 is an abundant number, since it is smaller than the sum of its proper divisors (8858924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6644172 is a wasteful number, since it uses less digits than its factorization.

6644172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553688 (or 553686 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 6644172 is about 2577.6291432244. The cubic root of 6644172 is about 187.9952843241.

The spelling of 6644172 in words is "six million, six hundred forty-four thousand, one hundred seventy-two".