166555217210 has 32 divisors (see below), whose sum is σ = 302052868992. Its totient is φ = 66122527680.

The previous prime is 166555217203. The next prime is 166555217243. The reversal of 166555217210 is 12712555661.

166555217210 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1028429 + ... + 1179311.

It is an arithmetic number, because the mean of its divisors is an integer number (9439152156).

Almost surely, 2^166555217210 is an apocalyptic number.

166555217210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166555217210 is a deficient number, since it is larger than the sum of its proper divisors (135497651782).

166555217210 is a wasteful number, since it uses less digits than its factorization.

166555217210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151718.

The product of its (nonzero) digits is 126000, while the sum is 41.

The spelling of 166555217210 in words is "one hundred sixty-six billion, five hundred fifty-five million, two hundred seventeen thousand, two hundred ten".