68665143 has 8 divisors (see below), whose sum is σ = 95534208. Its totient is φ = 43786424.

The previous prime is 68665133. The next prime is 68665171. The reversal of 68665143 is 34156686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68665143 - 2⁵ = 68665111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68665123) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 497505 + ... + 497642.

It is an arithmetic number, because the mean of its divisors is an integer number (11941776).

Almost surely, 2^68665143 is an apocalyptic number.

68665143 is a deficient number, since it is larger than the sum of its proper divisors (26869065).

68665143 is a wasteful number, since it uses less digits than its factorization.

68665143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995173.

The product of its digits is 103680, while the sum is 39.

The square root of 68665143 is about 8286.4433263011. The cubic root of 68665143 is about 409.4920201021.

The spelling of 68665143 in words is "sixty-eight million, six hundred sixty-five thousand, one hundred forty-three".