688846660467671 has 2 divisors, whose sum is σ = 688846660467672. Its totient is φ = 688846660467670.

The previous prime is 688846660467653. The next prime is 688846660467751. The reversal of 688846660467671 is 176764066648886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 688846660467671 - 2¹⁰ = 688846660466647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 688846660467671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688846660467271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344423330233835 + 344423330233836.

It is an arithmetic number, because the mean of its divisors is an integer number (344423330233836).

Almost surely, 2^{688846660467671} is an apocalyptic number.

688846660467671 is a deficient number, since it is larger than the sum of its proper divisors (1).

688846660467671 is an equidigital number, since it uses as much as digits as its factorization.

688846660467671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18728091648, while the sum is 83.

The spelling of 688846660467671 in words is "six hundred eighty-eight trillion, eight hundred forty-six billion, six hundred sixty million, four hundred sixty-seven thousand, six hundred seventy-one".