71666303456 has 48 divisors (see below), whose sum is σ = 154065276288. Its totient is φ = 32544777600.

The previous prime is 71666303441. The next prime is 71666303479. The reversal of 71666303456 is 65430366617.

It is a self number, because there is not a number n which added to its sum of digits gives 71666303456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278411 + ... + 469941.

It is an arithmetic number, because the mean of its divisors is an integer number (3209693256).

Almost surely, 2^71666303456 is an apocalyptic number.

It is an amenable number.

71666303456 is an abundant number, since it is smaller than the sum of its proper divisors (82398972832).

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

71666303456 is a wasteful number, since it uses less digits than its factorization.

71666303456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192615 (or 192607 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 47.

The spelling of 71666303456 in words is "seventy-one billion, six hundred sixty-six million, three hundred three thousand, four hundred fifty-six".