68017656 has 64 divisors (see below), whose sum is σ = 198028800. Its totient is φ = 19064448.

The previous prime is 68017637. The next prime is 68017679. The reversal of 68017656 is 65671086.

It is a house number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5085 + ... + 12723.

It is an arithmetic number, because the mean of its divisors is an integer number (3094200).

Almost surely, 2^68017656 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 68017656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99014400).

68017656 is an abundant number, since it is smaller than the sum of its proper divisors (130011144).

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

68017656 is a wasteful number, since it uses less digits than its factorization.

68017656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7708 (or 7704 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 68017656 is about 8247.2817340018. The cubic root of 68017656 is about 408.2008334595.

It can be divided in two parts, 680 and 17656, that added together give a triangular number (18336 = T₁₉₁).

The spelling of 68017656 in words is "sixty-eight million, seventeen thousand, six hundred fifty-six".