6690925 has 6 divisors (see below), whose sum is σ = 8296778. Its totient is φ = 5352720.

The previous prime is 6690923. The next prime is 6690941. The reversal of 6690925 is 5290966.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 310249 + 6380676 = 557^2 + 2526^2 .

It is not a de Polignac number, because 6690925 - 2¹ = 6690923 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6690923) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 133794 + ... + 133843.

Almost surely, 2^6690925 is an apocalyptic number.

It is an amenable number.

6690925 is a deficient number, since it is larger than the sum of its proper divisors (1605853).

6690925 is a wasteful number, since it uses less digits than its factorization.

6690925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267647 (or 267642 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 6690925 is about 2586.6822379256. The cubic root of 6690925 is about 188.4352091071.

The spelling of 6690925 in words is "six million, six hundred ninety thousand, nine hundred twenty-five".