68029108668 has 72 divisors (see below), whose sum is σ = 175693557312. Its totient is φ = 22184756352.

The previous prime is 68029108661. The next prime is 68029108699. The reversal of 68029108668 is 86680192086.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68029108661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4996446 + ... + 5010042.

It is an arithmetic number, because the mean of its divisors is an integer number (2440188296).

Almost surely, 2^68029108668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68029108668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87846778656).

68029108668 is an abundant number, since it is smaller than the sum of its proper divisors (107664448644).

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

68029108668 is a wasteful number, since it uses less digits than its factorization.

68029108668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16611 (or 16606 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 68029108668 in words is "sixty-eight billion, twenty-nine million, one hundred eight thousand, six hundred sixty-eight".