6688949796 has 81 divisors (see below), whose sum is σ = 17365316241. Its totient is φ = 2170927584.

The previous prime is 6688949737. The next prime is 6688949801. The reversal of 6688949796 is 6979498866.

The square root of 6688949796 is 81786.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 374422500 + 6314527296 = 19350^2 + 79464^2 .

It is a super-3 number, since 3×6688949796³ (a number of 30 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 21100630 + ... + 21100946.

Almost surely, 2^6688949796 is an apocalyptic number.

6688949796 is the 81786-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6688949796

6688949796 is an abundant number, since it is smaller than the sum of its proper divisors (10676366445).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6688949796 is a wasteful number, since it uses less digits than its factorization.

6688949796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730 (or 365 counting only the distinct ones).

The product of its digits is 282175488, while the sum is 72.

The cubic root of 6688949796 is about 1884.1666485446.

It can be divided in two parts, 6688 and 949796, that added together give a square (956484 = 978²).

The spelling of 6688949796 in words is "six billion, six hundred eighty-eight million, nine hundred forty-nine thousand, seven hundred ninety-six".