6681725 has 12 divisors (see below), whose sum is σ = 8327220. Its totient is φ = 5318400.

The previous prime is 6681721. The next prime is 6681733. The reversal of 6681725 is 5271866.

It can be written as a sum of positive squares in 6 ways, for example, as 737881 + 5943844 = 859^2 + 2438^2 .

It is not a de Polignac number, because 6681725 - 2² = 6681721 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5471 + ... + 6579.

It is an arithmetic number, because the mean of its divisors is an integer number (693935).

Almost surely, 2^6681725 is an apocalyptic number.

It is an amenable number.

6681725 is a deficient number, since it is larger than the sum of its proper divisors (1645495).

6681725 is a wasteful number, since it uses less digits than its factorization.

6681725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360 (or 1355 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 6681725 is about 2584.9032863920. The cubic root of 6681725 is about 188.3488035603.

The spelling of 6681725 in words is "six million, six hundred eighty-one thousand, seven hundred twenty-five".