68005885 has 4 divisors (see below), whose sum is σ = 81607068. Its totient is φ = 54404704.

The previous prime is 68005877. The next prime is 68005897. The reversal of 68005885 is 58850086.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20313049 + 47692836 = 4507^2 + 6906^2 .

It is a cyclic number.

It is not a de Polignac number, because 68005885 - 2³ = 68005877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6800584 + ... + 6800593.

It is an arithmetic number, because the mean of its divisors is an integer number (20401767).

Almost surely, 2^68005885 is an apocalyptic number.

It is an amenable number.

68005885 is a deficient number, since it is larger than the sum of its proper divisors (13601183).

68005885 is a wasteful number, since it uses less digits than its factorization.

68005885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13601182.

The product of its (nonzero) digits is 76800, while the sum is 40.

The square root of 68005885 is about 8246.5680740536. The cubic root of 68005885 is about 408.1772846267.

The spelling of 68005885 in words is "sixty-eight million, five thousand, eight hundred eighty-five".