71306668887 has 16 divisors (see below), whose sum is σ = 100126191360. Its totient is φ = 45014795712.

The previous prime is 71306668817. The next prime is 71306668889. The reversal of 71306668887 is 78886660317.

It is not a de Polignac number, because 71306668887 - 2¹¹ = 71306666839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71306668887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71306668889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167803 + ... + 413244.

It is an arithmetic number, because the mean of its divisors is an integer number (6257886960).

Almost surely, 2^71306668887 is an apocalyptic number.

71306668887 is a deficient number, since it is larger than the sum of its proper divisors (28819522473).

71306668887 is a wasteful number, since it uses less digits than its factorization.

71306668887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583222.

The product of its (nonzero) digits is 16257024, while the sum is 60.

The spelling of 71306668887 in words is "seventy-one billion, three hundred six million, six hundred sixty-eight thousand, eight hundred eighty-seven".