82666558620564 has 48 divisors (see below), whose sum is σ = 199553034844800. Its totient is φ = 26603587110016.

The previous prime is 82666558620533. The next prime is 82666558620577. The reversal of 82666558620564 is 46502685566628.

82666558620564 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2449719 + ... + 13089470.

It is an arithmetic number, because the mean of its divisors is an integer number (4157354892600).

Almost surely, 2^{82666558620564} is an apocalyptic number.

It is an amenable number.

82666558620564 is an abundant number, since it is smaller than the sum of its proper divisors (116886476224236).

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

82666558620564 is a wasteful number, since it uses less digits than its factorization.

82666558620564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15554512 (or 15554510 counting only the distinct ones).

The product of its (nonzero) digits is 995328000, while the sum is 69.

The spelling of 82666558620564 in words is "eighty-two trillion, six hundred sixty-six billion, five hundred fifty-eight million, six hundred twenty thousand, five hundred sixty-four".