688665062 has 8 divisors (see below), whose sum is σ = 1066320192. Its totient is φ = 333225000.

The previous prime is 688665049. The next prime is 688665067. The reversal of 688665062 is 260566886.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 688664998 and 688665016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688665067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5553689 + ... + 5553812.

It is an arithmetic number, because the mean of its divisors is an integer number (133290024).

Almost surely, 2^688665062 is an apocalyptic number.

688665062 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

688665062 is a deficient number, since it is larger than the sum of its proper divisors (377655130).

688665062 is a wasteful number, since it uses less digits than its factorization.

688665062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11107534.

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 688665062 is about 26242.4286604727. The cubic root of 688665062 is about 883.0853569818.

The spelling of 688665062 in words is "six hundred eighty-eight million, six hundred sixty-five thousand, sixty-two".