688846660467701 has 4 divisors (see below), whose sum is σ = 688846713101004. Its totient is φ = 688846607834400.

The previous prime is 688846660467671. The next prime is 688846660467751. The reversal of 688846660467701 is 107764066648886.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 544080163176676 + 144766497291025 = 23325526^2 + 12031895^2 .

It is a cyclic number.

It is not a de Polignac number, because 688846660467701 - 2¹⁴ = 688846660451317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688846660467751) 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 in 3 ways as a sum of consecutive naturals, for example, 10265441 + ... + 38510681.

It is an arithmetic number, because the mean of its divisors is an integer number (172211678275251).

Almost surely, 2^{688846660467701} is an apocalyptic number.

It is an amenable number.

688846660467701 is a deficient number, since it is larger than the sum of its proper divisors (52633303).

688846660467701 is a wasteful number, since it uses less digits than its factorization.

688846660467701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52633302.

The product of its (nonzero) digits is 3121348608, while the sum is 77.

The spelling of 688846660467701 in words is "six hundred eighty-eight trillion, eight hundred forty-six billion, six hundred sixty million, four hundred sixty-seven thousand, seven hundred one".