6644973 has 8 divisors (see below), whose sum is σ = 9165600. Its totient is φ = 4277168.

The previous prime is 6644969. The next prime is 6644983. The reversal of 6644973 is 3794466.

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

It is a cyclic number.

It is not a de Polignac number, because 6644973 - 2² = 6644969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644903) 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 7 ways as a sum of consecutive naturals, for example, 38103 + ... + 38276.

It is an arithmetic number, because the mean of its divisors is an integer number (1145700).

Almost surely, 2^6644973 is an apocalyptic number.

It is an amenable number.

6644973 is a deficient number, since it is larger than the sum of its proper divisors (2520627).

6644973 is a wasteful number, since it uses less digits than its factorization.

6644973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76411.

The product of its digits is 108864, while the sum is 39.

The square root of 6644973 is about 2577.7845138801. The cubic root of 6644973 is about 188.0028387228.

The spelling of 6644973 in words is "six million, six hundred forty-four thousand, nine hundred seventy-three".