68146685 has 4 divisors (see below), whose sum is σ = 81776028. Its totient is φ = 54517344.

The previous prime is 68146669. The next prime is 68146717. The reversal of 68146685 is 58664186.

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 17480761 + 50665924 = 4181^2 + 7118^2 .

It is a cyclic number.

It is not a de Polignac number, because 68146685 - 2⁴ = 68146669 is a prime.

It is a Duffinian number.

It is a Curzon 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, 6814664 + ... + 6814673.

It is an arithmetic number, because the mean of its divisors is an integer number (20444007).

Almost surely, 2^68146685 is an apocalyptic number.

It is an amenable number.

68146685 is a deficient number, since it is larger than the sum of its proper divisors (13629343).

68146685 is a wasteful number, since it uses less digits than its factorization.

68146685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13629342.

The product of its digits is 276480, while the sum is 44.

The square root of 68146685 is about 8255.1005445119. The cubic root of 68146685 is about 408.4587884219.

The spelling of 68146685 in words is "sixty-eight million, one hundred forty-six thousand, six hundred eighty-five".