6646725 has 48 divisors (see below), whose sum is σ = 12548800. Its totient is φ = 3447360.

The previous prime is 6646699. The next prime is 6646769. The reversal of 6646725 is 5276466.

6646725 is a `hidden beast` number, since 6 + 646 + 7 + 2 + 5 = 666.

It is not a de Polignac number, because 6646725 - 2¹⁶ = 6581189 is a prime.

Its product of digits (60480) is a multiple of the sum of its prime divisors (280).

It is a self number, because there is not a number n which added to its sum of digits gives 6646725.

It is a congruent number.

It is an unprimeable number.

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, 28911 + ... + 29139.

Almost surely, 2^6646725 is an apocalyptic number.

It is an amenable number.

6646725 is a deficient number, since it is larger than the sum of its proper divisors (5902075).

6646725 is a wasteful number, since it uses less digits than its factorization.

6646725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 280 counting only the distinct ones).

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

The square root of 6646725 is about 2578.1243181817. The cubic root of 6646725 is about 188.0193600856.

The spelling of 6646725 in words is "six million, six hundred forty-six thousand, seven hundred twenty-five".