688668525866886 has 64 divisors (see below), whose sum is σ = 1434461940000000. Its totient is φ = 220142507018112.

The previous prime is 688668525866863. The next prime is 688668525866887.

688668525866886 is nontrivially palindromic in base 10.

688668525866886 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 688668525866793 and 688668525866802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688668525866887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 556765305 + ... + 558000843.

It is an arithmetic number, because the mean of its divisors is an integer number (22413467812500).

Almost surely, 2^{688668525866886} is an apocalyptic number.

688668525866886 is an abundant number, since it is smaller than the sum of its proper divisors (745793414133114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

688668525866886 is a wasteful number, since it uses less digits than its factorization.

688668525866886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257221.

The product of its digits is 611529523200, while the sum is 96.

The spelling of 688668525866886 in words is "six hundred eighty-eight trillion, six hundred sixty-eight billion, five hundred twenty-five million, eight hundred sixty-six thousand, eight hundred eighty-six".