688665786311 has 2 divisors, whose sum is σ = 688665786312. Its totient is φ = 688665786310.

The previous prime is 688665786301. The next prime is 688665786359. The reversal of 688665786311 is 113687566886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 688665786311 - 2²⁶ = 688598677447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688665786301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344332893155 + 344332893156.

It is an arithmetic number, because the mean of its divisors is an integer number (344332893156).

Almost surely, 2^688665786311 is an apocalyptic number.

688665786311 is a deficient number, since it is larger than the sum of its proper divisors (1).

688665786311 is an equidigital number, since it uses as much as digits as its factorization.

688665786311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69672960, while the sum is 65.

The spelling of 688665786311 in words is "six hundred eighty-eight billion, six hundred sixty-five million, seven hundred eighty-six thousand, three hundred eleven".