68161686 has 16 divisors (see below), whose sum is σ = 136464384. Its totient is φ = 22697064.

The previous prime is 68161661. The next prime is 68161693. The reversal of 68161686 is 68616186.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1035 + ... + 11721.

It is an arithmetic number, because the mean of its divisors is an integer number (8529024).

Almost surely, 2^68161686 is an apocalyptic number.

68161686 is an abundant number, since it is smaller than the sum of its proper divisors (68302698).

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

68161686 is a wasteful number, since it uses less digits than its factorization.

68161686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11755.

The product of its digits is 82944, while the sum is 42.

The square root of 68161686 is about 8256.0090842973. The cubic root of 68161686 is about 408.4887573081.

The spelling of 68161686 in words is "sixty-eight million, one hundred sixty-one thousand, six hundred eighty-six".