6644673 has 20 divisors (see below), whose sum is σ = 11344960. Its totient is φ = 3796632.

The previous prime is 6644647. The next prime is 6644681. The reversal of 6644673 is 3764466.

6644673 is a `hidden beast` number, since 6 + 644 + 6 + 7 + 3 = 666.

It is a Cunningham number, because it is equal to 188³+1.

It is not a de Polignac number, because 6644673 - 2¹⁰ = 6643649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6644273) 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 19 ways as a sum of consecutive naturals, for example, 5293 + ... + 6426.

It is an arithmetic number, because the mean of its divisors is an integer number (567248).

Almost surely, 2^6644673 is an apocalyptic number.

6644673 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

6644673 is a deficient number, since it is larger than the sum of its proper divisors (4700287).

6644673 is a wasteful number, since it uses less digits than its factorization.

6644673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11738 (or 11729 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 6644673 is about 2577.7263237202. The cubic root of 6644673 is about 188.0000094311. Note that the first 5 decimals are identical.

The spelling of 6644673 in words is "six million, six hundred forty-four thousand, six hundred seventy-three".