166239752020 has 24 divisors (see below), whose sum is σ = 350668975104. Its totient is φ = 66197711136.

The previous prime is 166239751961. The next prime is 166239752083. The reversal of 166239752020 is 20257932661.

166239752020 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-3 number, since 3×166239752020³ (a number of 35 digits) contains 333 as substring.

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, 18632284 + ... + 18641203.

It is an arithmetic number, because the mean of its divisors is an integer number (14611207296).

Almost surely, 2^166239752020 is an apocalyptic number.

166239752020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166239752020 is an abundant number, since it is smaller than the sum of its proper divisors (184429223084).

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

166239752020 is a wasteful number, since it uses less digits than its factorization.

166239752020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37273719 (or 37273717 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 166239752020 in words is "one hundred sixty-six billion, two hundred thirty-nine million, seven hundred fifty-two thousand, twenty".