68005556 has 24 divisors (see below), whose sum is σ = 123019680. Its totient is φ = 32869152.

The previous prime is 68005543. The next prime is 68005571. The reversal of 68005556 is 65550086.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22715 + ... + 25533.

It is an arithmetic number, because the mean of its divisors is an integer number (5125820).

Almost surely, 2^68005556 is an apocalyptic number.

It is an amenable number.

68005556 is a deficient number, since it is larger than the sum of its proper divisors (55014124).

68005556 is a wasteful number, since it uses less digits than its factorization.

68005556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3023 (or 3021 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 68005556 is about 8246.5481263375. The cubic root of 68005556 is about 408.1766263967.

The spelling of 68005556 in words is "sixty-eight million, five thousand, five hundred fifty-six".