688665786327 has 12 divisors (see below), whose sum is σ = 994845201480. Its totient is φ = 459061724688.

The previous prime is 688665786311. The next prime is 688665786359. The reversal of 688665786327 is 723687566886.

It is not a de Polignac number, because 688665786327 - 2⁴ = 688665786311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688665786527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3977148 + ... + 4146689.

It is an arithmetic number, because the mean of its divisors is an integer number (82903766790).

Almost surely, 2^688665786327 is an apocalyptic number.

688665786327 is a deficient number, since it is larger than the sum of its proper divisors (306179415153).

688665786327 is a wasteful number, since it uses less digits than its factorization.

688665786327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8133262 (or 8133259 counting only the distinct ones).

The product of its digits is 975421440, while the sum is 72.

The spelling of 688665786327 in words is "six hundred eighty-eight billion, six hundred sixty-five million, seven hundred eighty-six thousand, three hundred twenty-seven".