6644137 has 8 divisors (see below), whose sum is σ = 6947840. Its totient is φ = 6346080.

The previous prime is 6644123. The next prime is 6644147. The reversal of 6644137 is 7314466.

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 6644137 - 2¹¹ = 6642089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6644099 and 6644108.

It is not an unprimeable number, because it can be changed into a prime (6644147) 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 7 ways as a sum of consecutive naturals, for example, 1093 + ... + 3805.

It is an arithmetic number, because the mean of its divisors is an integer number (868480).

Almost surely, 2^6644137 is an apocalyptic number.

It is an amenable number.

6644137 is a deficient number, since it is larger than the sum of its proper divisors (303703).

6644137 is a wasteful number, since it uses less digits than its factorization.

6644137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823.

The product of its digits is 12096, while the sum is 31.

The square root of 6644137 is about 2577.6223540309. The cubic root of 6644137 is about 187.9949542180.

The spelling of 6644137 in words is "six million, six hundred forty-four thousand, one hundred thirty-seven".