82005520666 has 8 divisors (see below), whose sum is σ = 123075467424. Its totient is φ = 40980364860.

The previous prime is 82005520657. The next prime is 82005520697. The reversal of 82005520666 is 66602550028.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 11193160 + ... + 11200483.

It is an arithmetic number, because the mean of its divisors is an integer number (15384433428).

Almost surely, 2^82005520666 is an apocalyptic number.

82005520666 is a deficient number, since it is larger than the sum of its proper divisors (41069946758).

82005520666 is a wasteful number, since it uses less digits than its factorization.

82005520666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22395476.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 82005520666 in words is "eighty-two billion, five million, five hundred twenty thousand, six hundred sixty-six".