6625644 has 12 divisors (see below), whose sum is σ = 15459864. Its totient is φ = 2208544.

The previous prime is 6625639. The next prime is 6625667. The reversal of 6625644 is 4465266.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 276057 + ... + 276080.

It is an arithmetic number, because the mean of its divisors is an integer number (1288322).

Almost surely, 2^6625644 is an apocalyptic number.

It is an amenable number.

6625644 is an abundant number, since it is smaller than the sum of its proper divisors (8834220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6625644 is a wasteful number, since it uses less digits than its factorization.

6625644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552144 (or 552142 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 6625644 is about 2574.0326338258. The cubic root of 6625644 is about 187.8203731693.

The spelling of 6625644 in words is "six million, six hundred twenty-five thousand, six hundred forty-four".