688099660 has 12 divisors (see below), whose sum is σ = 1445009328. Its totient is φ = 275239856.

The previous prime is 688099651. The next prime is 688099691. The reversal of 688099660 is 66990886.

It is a super-2 number, since 2×688099660² = 946962284184231200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 688099598 and 688099607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17202472 + ... + 17202511.

It is an arithmetic number, because the mean of its divisors is an integer number (120417444).

Almost surely, 2^688099660 is an apocalyptic number.

It is an amenable number.

688099660 is an abundant number, since it is smaller than the sum of its proper divisors (756909668).

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

688099660 is a wasteful number, since it uses less digits than its factorization.

688099660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34404992 (or 34404990 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 52.

The square root of 688099660 is about 26231.6537793560. The cubic root of 688099660 is about 882.8436163737.

The spelling of 688099660 in words is "six hundred eighty-eight million, ninety-nine thousand, six hundred sixty".