166161353211 has 24 divisors (see below), whose sum is σ = 284457298944. Its totient is φ = 94949343720.

The previous prime is 166161353209. The next prime is 166161353219. The reversal of 166161353211 is 112353161661.

166161353211 is a `hidden beast` number, since 1 + 6 + 6 + 1 + 613 + 5 + 32 + 1 + 1 = 666.

It is not a de Polignac number, because 166161353211 - 2¹ = 166161353209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166161353219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48840555 + ... + 48843956.

It is an arithmetic number, because the mean of its divisors is an integer number (11852387456).

Almost surely, 2^166161353211 is an apocalyptic number.

166161353211 is a deficient number, since it is larger than the sum of its proper divisors (118295945733).

166161353211 is an frugal number, since it uses more digits than its factorization.

166161353211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97684533 (or 97684521 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The spelling of 166161353211 in words is "one hundred sixty-six billion, one hundred sixty-one million, three hundred fifty-three thousand, two hundred eleven".