71542794666 has 96 divisors (see below), whose sum is σ = 172171008000. Its totient is φ = 19740520800.

The previous prime is 71542794619. The next prime is 71542794671. The reversal of 71542794666 is 66649724517.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4540021 + ... + 4555751.

It is an arithmetic number, because the mean of its divisors is an integer number (1793448000).

Almost surely, 2^71542794666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71542794666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86085504000).

71542794666 is an abundant number, since it is smaller than the sum of its proper divisors (100628213334).

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

71542794666 is a wasteful number, since it uses less digits than its factorization.

71542794666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16280 (or 16273 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 57.

The spelling of 71542794666 in words is "seventy-one billion, five hundred forty-two million, seven hundred ninety-four thousand, six hundred sixty-six".