6688769744 has 10 divisors (see below), whose sum is σ = 12959491410. Its totient is φ = 3344384864.

The previous prime is 6688769719. The next prime is 6688769779. The reversal of 6688769744 is 4479678866.

It can be written as a sum of positive squares in only one way, i.e., 6672929344 + 15840400 = 81688^2 + 3980^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209024039 + ... + 209024070.

It is an arithmetic number, because the mean of its divisors is an integer number (1295949141).

Almost surely, 2^6688769744 is an apocalyptic number.

It is an amenable number.

6688769744 is a deficient number, since it is larger than the sum of its proper divisors (6270721666).

6688769744 is a wasteful number, since it uses less digits than its factorization.

6688769744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418048117 (or 418048111 counting only the distinct ones).

The product of its digits is 97542144, while the sum is 65.

The square root of 6688769744 is about 81784.8992418527. The cubic root of 6688769744 is about 1884.1497425017.

It can be divided in two parts, 66887 and 69744, that added together give a palindrome (136631).

The spelling of 6688769744 in words is "six billion, six hundred eighty-eight million, seven hundred sixty-nine thousand, seven hundred forty-four".