68651856 has 240 divisors, whose sum is σ = 245539840. Its totient is φ = 17521920.

The previous prime is 68651839. The next prime is 68651857. The reversal of 68651856 is 65815686.

68651856 is a `hidden beast` number, since 6 + 86 + 518 + 56 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68651857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2214561 + ... + 2214591.

Almost surely, 2^68651856 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 68651856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122769920).

68651856 is an abundant number, since it is smaller than the sum of its proper divisors (176887984).

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

68651856 is a wasteful number, since it uses less digits than its factorization.

68651856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 56 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 68651856 is about 8285.6415563310. The cubic root of 68651856 is about 409.4656055769.

The spelling of 68651856 in words is "sixty-eight million, six hundred fifty-one thousand, eight hundred fifty-six".