6647625 has 48 divisors (see below), whose sum is σ = 12654720. Its totient is φ = 3348000.

The previous prime is 6647623. The next prime is 6647647. The reversal of 6647625 is 5267466.

6647625 is a `hidden beast` number, since 6 + 647 + 6 + 2 + 5 = 666.

It is not a de Polignac number, because 6647625 - 2¹ = 6647623 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6647625.

It is not an unprimeable number, because it can be changed into a prime (6647623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21220 + ... + 21530.

It is an arithmetic number, because the mean of its divisors is an integer number (263640).

Almost surely, 2^6647625 is an apocalyptic number.

It is an amenable number.

6647625 is a deficient number, since it is larger than the sum of its proper divisors (6007095).

6647625 is a wasteful number, since it uses less digits than its factorization.

6647625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 338 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 6647625 is about 2578.2988577742. The cubic root of 6647625 is about 188.0278459583.

The spelling of 6647625 in words is "six million, six hundred forty-seven thousand, six hundred twenty-five".