6684725 has 6 divisors (see below), whose sum is σ = 8289090. Its totient is φ = 5347760.

The previous prime is 6684719. The next prime is 6684749. The reversal of 6684725 is 5274866.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2283121 + 4401604 = 1511^2 + 2098^2 .

It is not a de Polignac number, because 6684725 - 2¹⁴ = 6668341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 133670 + ... + 133719.

It is an arithmetic number, because the mean of its divisors is an integer number (1381515).

Almost surely, 2^6684725 is an apocalyptic number.

It is an amenable number.

6684725 is a deficient number, since it is larger than the sum of its proper divisors (1604365).

6684725 is a wasteful number, since it uses less digits than its factorization.

6684725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267399 (or 267394 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 6684725 is about 2585.4835137746. The cubic root of 6684725 is about 188.3769879920.

The spelling of 6684725 in words is "six million, six hundred eighty-four thousand, seven hundred twenty-five".