166021564203020 has 24 divisors (see below), whose sum is σ = 353058516283200. Its totient is φ = 65568010165632.

The previous prime is 166021564203017. The next prime is 166021564203037. The reversal of 166021564203020 is 20302465120661.

166021564203020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 52538468105 + ... + 52538471264.

It is an arithmetic number, because the mean of its divisors is an integer number (14710771511800).

Almost surely, 2^{166021564203020} is an apocalyptic number.

166021564203020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166021564203020 is an abundant number, since it is smaller than the sum of its proper divisors (187036952080180).

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

166021564203020 is a wasteful number, since it uses less digits than its factorization.

166021564203020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105076939457 (or 105076939455 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 166021564203020 in words is "one hundred sixty-six trillion, twenty-one billion, five hundred sixty-four million, two hundred three thousand, twenty".