6805664 has 12 divisors (see below), whose sum is σ = 13398714. Its totient is φ = 3402816.

The previous prime is 6805663. The next prime is 6805679. The reversal of 6805664 is 4665086.

It can be written as a sum of positive squares in only one way, i.e., 4579600 + 2226064 = 2140^2 + 1492^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6805663) 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 as a sum of consecutive naturals, namely, 106307 + ... + 106370.

Almost surely, 2^6805664 is an apocalyptic number.

It is an amenable number.

6805664 is a deficient number, since it is larger than the sum of its proper divisors (6593050).

6805664 is a wasteful number, since it uses less digits than its factorization.

6805664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212687 (or 212679 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 6805664 is about 2608.7667584512. The cubic root of 6805664 is about 189.5062340873.

The spelling of 6805664 in words is "six million, eight hundred five thousand, six hundred sixty-four".