166530216535504 has 40 divisors (see below), whose sum is σ = 325971201585960. Its totient is φ = 82409245248000.

The previous prime is 166530216535303. The next prime is 166530216535513. The reversal of 166530216535504 is 405535612035661.

It can be written as a sum of positive squares in 4 ways, for example, as 149358707137600 + 17171509397904 = 12221240^2 + 4143852^2 .

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, 15423159 + ... + 23894230.

It is an arithmetic number, because the mean of its divisors is an integer number (8149280039649).

Almost surely, 2^{166530216535504} is an apocalyptic number.

It is an amenable number.

166530216535504 is a deficient number, since it is larger than the sum of its proper divisors (159440985050456).

166530216535504 is a wasteful number, since it uses less digits than its factorization.

166530216535504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39320119 (or 39320113 counting only the distinct ones).

The product of its (nonzero) digits is 9720000, while the sum is 52.

The spelling of 166530216535504 in words is "one hundred sixty-six trillion, five hundred thirty billion, two hundred sixteen million, five hundred thirty-five thousand, five hundred four".