68616871 has 4 divisors (see below), whose sum is σ = 70983000. Its totient is φ = 66250744.

The previous prime is 68616827. The next prime is 68616881. The reversal of 68616871 is 17861686.

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

It is a cyclic number.

It is not a de Polignac number, because 68616871 - 2¹¹ = 68614823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68616881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1183021 + ... + 1183078.

It is an arithmetic number, because the mean of its divisors is an integer number (17745750).

Almost surely, 2^68616871 is an apocalyptic number.

68616871 is a deficient number, since it is larger than the sum of its proper divisors (2366129).

68616871 is a wasteful number, since it uses less digits than its factorization.

68616871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366128.

The product of its digits is 96768, while the sum is 43.

The square root of 68616871 is about 8283.5301049734. The cubic root of 68616871 is about 409.3960391728.

The spelling of 68616871 in words is "sixty-eight million, six hundred sixteen thousand, eight hundred seventy-one".