71867659668 has 144 divisors (see below), whose sum is σ = 201409173504. Its totient is φ = 19874211840.

The previous prime is 71867659663. The next prime is 71867659691. The reversal of 71867659668 is 86695676817.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71867659663) 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 47 ways as a sum of consecutive naturals, for example, 3049980 + ... + 3073452.

It is an arithmetic number, because the mean of its divisors is an integer number (1398674816).

Almost surely, 2^71867659668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71867659668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100704586752).

71867659668 is an abundant number, since it is smaller than the sum of its proper divisors (129541513836).

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

71867659668 is a wasteful number, since it uses less digits than its factorization.

71867659668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23662 (or 23653 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 69.

The spelling of 71867659668 in words is "seventy-one billion, eight hundred sixty-seven million, six hundred fifty-nine thousand, six hundred sixty-eight".