6661825 has 12 divisors (see below), whose sum is σ = 8293120. Its totient is φ = 5308560.

The previous prime is 6661783. The next prime is 6661849. The reversal of 6661825 is 5281666.

It is not a de Polignac number, because 6661825 - 2⁹ = 6661313 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 10672 + ... + 11278.

Almost surely, 2^6661825 is an apocalyptic number.

It is an amenable number.

6661825 is a deficient number, since it is larger than the sum of its proper divisors (1631295).

6661825 is a wasteful number, since it uses less digits than its factorization.

6661825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056 (or 1051 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 6661825 is about 2581.0511424611. The cubic root of 6661825 is about 188.1616329143.

The spelling of 6661825 in words is "six million, six hundred sixty-one thousand, eight hundred twenty-five".