68765816 has 72 divisors (see below), whose sum is σ = 159590880. Its totient is φ = 27691776.

The previous prime is 68765803. The next prime is 68765831. The reversal of 68765816 is 61856786.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 112985 + ... + 113591.

It is an arithmetic number, because the mean of its divisors is an integer number (2216540).

Almost surely, 2^68765816 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 68765816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79795440).

68765816 is an abundant number, since it is smaller than the sum of its proper divisors (90825064).

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

68765816 is a wasteful number, since it uses less digits than its factorization.

68765816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661 (or 633 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 68765816 is about 8292.5156617277. The cubic root of 68765816 is about 409.6920471589.

The spelling of 68765816 in words is "sixty-eight million, seven hundred sixty-five thousand, eight hundred sixteen".