166205839728 has 40 divisors (see below), whose sum is σ = 429488510976. Its totient is φ = 55386020800.

The previous prime is 166205839703. The next prime is 166205839733. The reversal of 166205839728 is 827938502661.

166205839728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166205839728² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 328368 + ... + 663503.

Almost surely, 2^166205839728 is an apocalyptic number.

It is an amenable number.

166205839728 is an abundant number, since it is smaller than the sum of its proper divisors (263282671248).

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

166205839728 is a wasteful number, since it uses less digits than its factorization.

166205839728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995373 (or 995367 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 166205839728 in words is "one hundred sixty-six billion, two hundred five million, eight hundred thirty-nine thousand, seven hundred twenty-eight".