166611650512 has 40 divisors (see below), whose sum is σ = 333979952040. Its totient is φ = 80423938560.

The previous prime is 166611650459. The next prime is 166611650537. The reversal of 166611650512 is 215056116661.

It can be written as a sum of positive squares in 4 ways, for example, as 75501850176 + 91109800336 = 274776^2 + 301844^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5726562 + ... + 5755582.

It is an arithmetic number, because the mean of its divisors is an integer number (8349498801).

Almost surely, 2^166611650512 is an apocalyptic number.

It is an amenable number.

166611650512 is an abundant number, since it is smaller than the sum of its proper divisors (167368301528).

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

166611650512 is a wasteful number, since it uses less digits than its factorization.

166611650512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41431 (or 41425 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 166611650512 in words is "one hundred sixty-six billion, six hundred eleven million, six hundred fifty thousand, five hundred twelve".