6644012 has 6 divisors (see below), whose sum is σ = 11627028. Its totient is φ = 3322004.

The previous prime is 6643999. The next prime is 6644023. The reversal of 6644012 is 2104466.

It is a happy number.

It is a super-2 number, since 2×6644012² = 88285790912288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830498 + ... + 830505.

It is an arithmetic number, because the mean of its divisors is an integer number (1937838).

Almost surely, 2^6644012 is an apocalyptic number.

It is an amenable number.

6644012 is a deficient number, since it is larger than the sum of its proper divisors (4983016).

6644012 is a wasteful number, since it uses less digits than its factorization.

6644012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661007 (or 1661005 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 6644012 is about 2577.5981067653. The cubic root of 6644012 is about 187.9937752579.

Adding to 6644012 its reverse (2104466), we get a palindrome (8748478).

The spelling of 6644012 in words is "six million, six hundred forty-four thousand, twelve".