71685678 has 8 divisors (see below), whose sum is σ = 143371368. Its totient is φ = 23895224.

The previous prime is 71685643. The next prime is 71685683. The reversal of 71685678 is 87658617.

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

71685678 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5973801 + ... + 5973812.

It is an arithmetic number, because the mean of its divisors is an integer number (17921421).

Almost surely, 2^71685678 is an apocalyptic number.

71685678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71685678 is a wasteful number, since it uses less digits than its factorization.

71685678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11947618.

The product of its digits is 564480, while the sum is 48.

The square root of 71685678 is about 8466.7395141223. The cubic root of 71685678 is about 415.4104962296.

The spelling of 71685678 in words is "seventy-one million, six hundred eighty-five thousand, six hundred seventy-eight".