6688822243 has 4 divisors (see below), whose sum is σ = 6689971288. Its totient is φ = 6687673200.

The previous prime is 6688822241. The next prime is 6688822279. The reversal of 6688822243 is 3422288866.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3422288866 = 2 ⋅1711144433.

It is a cyclic number.

It is not a de Polignac number, because 6688822243 - 2¹ = 6688822241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6688822241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565746 + ... + 577447.

It is an arithmetic number, because the mean of its divisors is an integer number (1672492822).

Almost surely, 2^6688822243 is an apocalyptic number.

6688822243 is a deficient number, since it is larger than the sum of its proper divisors (1149045).

6688822243 is a wasteful number, since it uses less digits than its factorization.

6688822243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149044.

The product of its digits is 1769472, while the sum is 49.

The square root of 6688822243 is about 81785.2201990066. The cubic root of 6688822243 is about 1884.1546719442.

The spelling of 6688822243 in words is "six billion, six hundred eighty-eight million, eight hundred twenty-two thousand, two hundred forty-three".