6688144 has 10 divisors (see below), whose sum is σ = 12958310. Its totient is φ = 3344064.

The previous prime is 6688127. The next prime is 6688151. The reversal of 6688144 is 4418866.

It can be written as a sum of positive squares in only one way, i.e., 5856400 + 831744 = 2420^2 + 912^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208989 + ... + 209020.

It is an arithmetic number, because the mean of its divisors is an integer number (1295831).

Almost surely, 2^6688144 is an apocalyptic number.

It is an amenable number.

6688144 is a deficient number, since it is larger than the sum of its proper divisors (6270166).

6688144 is a wasteful number, since it uses less digits than its factorization.

6688144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418017 (or 418011 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The square root of 6688144 is about 2586.1446208594. The cubic root of 6688144 is about 188.4090985699.

The spelling of 6688144 in words is "six million, six hundred eighty-eight thousand, one hundred forty-four".