6688197189 has 16 divisors (see below), whose sum is σ = 9911130240. Its totient is φ = 4457587680.

The previous prime is 6688197179. The next prime is 6688197199. The reversal of 6688197189 is 9817918866.

It is an interprime number because it is at equal distance from previous prime (6688197179) and next prime (6688197199).

It is not a de Polignac number, because 6688197189 - 2⁵ = 6688197157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6688197179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73929 + ... + 137265.

It is an arithmetic number, because the mean of its divisors is an integer number (619445640).

Almost surely, 2^6688197189 is an apocalyptic number.

It is an amenable number.

6688197189 is a deficient number, since it is larger than the sum of its proper divisors (3222933051).

6688197189 is a wasteful number, since it uses less digits than its factorization.

6688197189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67257 (or 67251 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 63.

The square root of 6688197189 is about 81781.3987958142. The cubic root of 6688197189 is about 1884.0959802415.

The spelling of 6688197189 in words is "six billion, six hundred eighty-eight million, one hundred ninety-seven thousand, one hundred eighty-nine".