6670665 has 24 divisors (see below), whose sum is σ = 11626368. Its totient is φ = 3538080.

The previous prime is 6670661. The next prime is 6670687. The reversal of 6670665 is 5660766.

6670665 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6670665 - 2² = 6670661 is a prime.

It is a Curzon number.

6670665 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6670661) 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 23 ways as a sum of consecutive naturals, for example, 11922 + ... + 12468.

It is an arithmetic number, because the mean of its divisors is an integer number (484432).

Almost surely, 2^6670665 is an apocalyptic number.

It is an amenable number.

6670665 is a deficient number, since it is larger than the sum of its proper divisors (4955703).

6670665 is a wasteful number, since it uses less digits than its factorization.

6670665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829 (or 826 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 6670665 is about 2582.7630553343. The cubic root of 6670665 is about 188.2448240139.

The spelling of 6670665 in words is "six million, six hundred seventy thousand, six hundred sixty-five".