68659668 has 288 divisors, whose sum is σ = 241532928. Its totient is φ = 15897600.

The previous prime is 68659663. The next prime is 68659687. The reversal of 68659668 is 86695686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68659663) 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 95 ways as a sum of consecutive naturals, for example, 1460821 + ... + 1460867.

It is an arithmetic number, because the mean of its divisors is an integer number (838656).

Almost surely, 2^68659668 is an apocalyptic number.

68659668 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68659668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120766464).

68659668 is an abundant number, since it is smaller than the sum of its proper divisors (172873260).

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

68659668 is a wasteful number, since it uses less digits than its factorization.

68659668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 118 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 68659668 is about 8286.1129608520. The cubic root of 68659668 is about 409.4811362276.

The spelling of 68659668 in words is "sixty-eight million, six hundred fifty-nine thousand, six hundred sixty-eight".