688564224766 has 16 divisors (see below), whose sum is σ = 1163087958528. Its totient is φ = 302887488600.

The previous prime is 688564224737. The next prime is 688564224769. The reversal of 688564224766 is 667422465886.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 688564224698 and 688564224707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688564224769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504811800 + ... + 504813163.

It is an arithmetic number, because the mean of its divisors is an integer number (72692997408).

Almost surely, 2^688564224766 is an apocalyptic number.

688564224766 is a deficient number, since it is larger than the sum of its proper divisors (474523733762).

688564224766 is a wasteful number, since it uses less digits than its factorization.

688564224766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009625007.

The product of its digits is 185794560, while the sum is 64.

The spelling of 688564224766 in words is "six hundred eighty-eight billion, five hundred sixty-four million, two hundred twenty-four thousand, seven hundred sixty-six".