6646670 has 8 divisors (see below), whose sum is σ = 11964024. Its totient is φ = 2658664.

The previous prime is 6646669. The next prime is 6646687. The reversal of 6646670 is 766466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6646670.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332324 + ... + 332343.

It is an arithmetic number, because the mean of its divisors is an integer number (1495503).

Almost surely, 2^6646670 is an apocalyptic number.

6646670 is a deficient number, since it is larger than the sum of its proper divisors (5317354).

6646670 is a wasteful number, since it uses less digits than its factorization.

6646670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664674.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 6646670 is about 2578.1136514902. The cubic root of 6646670 is about 188.0188414797.

The spelling of 6646670 in words is "six million, six hundred forty-six thousand, six hundred seventy".