6645766 has 8 divisors (see below), whose sum is σ = 10065744. Its totient is φ = 3290520.

The previous prime is 6645757. The next prime is 6645787. The reversal of 6645766 is 6675466.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15925 + ... + 16336.

It is an arithmetic number, because the mean of its divisors is an integer number (1258218).

Almost surely, 2^6645766 is an apocalyptic number.

6645766 is a deficient number, since it is larger than the sum of its proper divisors (3419978).

6645766 is a wasteful number, since it uses less digits than its factorization.

6645766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32366.

The product of its digits is 181440, while the sum is 40.

The square root of 6645766 is about 2577.9383235446. The cubic root of 6645766 is about 188.0103170738.

The spelling of 6645766 in words is "six million, six hundred forty-five thousand, seven hundred sixty-six".