6644536 has 8 divisors (see below), whose sum is σ = 12458520. Its totient is φ = 3322264.

The previous prime is 6644527. The next prime is 6644537. The reversal of 6644536 is 6354466.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 415276 + ... + 415291.

It is an arithmetic number, because the mean of its divisors is an integer number (1557315).

Almost surely, 2^6644536 is an apocalyptic number.

It is an amenable number.

6644536 is a deficient number, since it is larger than the sum of its proper divisors (5813984).

6644536 is a wasteful number, since it uses less digits than its factorization.

6644536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830573 (or 830569 counting only the distinct ones).

The product of its digits is 51840, while the sum is 34.

The square root of 6644536 is about 2577.6997497769. The cubic root of 6644536 is about 187.9987173596.

The spelling of 6644536 in words is "six million, six hundred forty-four thousand, five hundred thirty-six".