6688632497 has 2 divisors, whose sum is σ = 6688632498. Its totient is φ = 6688632496.

The previous prime is 6688632481. The next prime is 6688632589. The reversal of 6688632497 is 7942368866.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4995803761 + 1692828736 = 70681^2 + 41144^2 .

It is a cyclic number.

It is not a de Polignac number, because 6688632497 - 2⁴ = 6688632481 is a prime.

It is not a weakly prime, because it can be changed into another prime (6688632697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3344316248 + 3344316249.

It is an arithmetic number, because the mean of its divisors is an integer number (3344316249).

Almost surely, 2^6688632497 is an apocalyptic number.

It is an amenable number.

6688632497 is a deficient number, since it is larger than the sum of its proper divisors (1).

6688632497 is an equidigital number, since it uses as much as digits as its factorization.

6688632497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20901888, while the sum is 59.

The square root of 6688632497 is about 81784.0601645577. The cubic root of 6688632497 is about 1884.1368554448.

The spelling of 6688632497 in words is "six billion, six hundred eighty-eight million, six hundred thirty-two thousand, four hundred ninety-seven".