6644530 has 16 divisors (see below), whose sum is σ = 12078144. Its totient is φ = 2631600.

The previous prime is 6644527. The next prime is 6644537. The reversal of 6644530 is 354466.

It is not an unprimeable number, because it can be changed into a prime (6644537) 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, 2196 + ... + 4255.

It is an arithmetic number, because the mean of its divisors is an integer number (754884).

Almost surely, 2^6644530 is an apocalyptic number.

6644530 is a deficient number, since it is larger than the sum of its proper divisors (5433614).

6644530 is a wasteful number, since it uses less digits than its factorization.

6644530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6561.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 6644530 is about 2577.6985859483. The cubic root of 6644530 is about 187.9986607721.

Adding to 6644530 its reverse (354466), we get a palindrome (6998996).

Subtracting from 6644530 its reverse (354466), we obtain a square (6290064 = 2508²).

The spelling of 6644530 in words is "six million, six hundred forty-four thousand, five hundred thirty".