68888656 has 20 divisors (see below), whose sum is σ = 133860852. Its totient is φ = 34343936.

The previous prime is 68888653. The next prime is 68888671. The reversal of 68888656 is 65688886.

It can be written as a sum of positive squares in 2 ways, for example, as 38638656 + 30250000 = 6216^2 + 5500^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68888597 and 68888606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68888653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451 + ... + 11746.

Almost surely, 2^68888656 is an apocalyptic number.

It is an amenable number.

68888656 is a deficient number, since it is larger than the sum of its proper divisors (64972196).

68888656 is a wasteful number, since it uses less digits than its factorization.

68888656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12558 (or 12552 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 55.

The square root of 68888656 is about 8299.9190357497. The cubic root of 68888656 is about 409.9358535378.

The spelling of 68888656 in words is "sixty-eight million, eight hundred eighty-eight thousand, six hundred fifty-six".