166099610211 has 4 divisors (see below), whose sum is σ = 221466146952. Its totient is φ = 110733073472.

The previous prime is 166099610203. The next prime is 166099610213. The reversal of 166099610211 is 112016990661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166099610211 - 2³ = 166099610203 is a prime.

It is a super-2 number, since 2×166099610211² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166099610213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27683268366 + ... + 27683268371.

It is an arithmetic number, because the mean of its divisors is an integer number (55366536738).

Almost surely, 2^166099610211 is an apocalyptic number.

166099610211 is a deficient number, since it is larger than the sum of its proper divisors (55366536741).

166099610211 is an equidigital number, since it uses as much as digits as its factorization.

166099610211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55366536740.

The product of its (nonzero) digits is 34992, while the sum is 42.

The spelling of 166099610211 in words is "one hundred sixty-six billion, ninety-nine million, six hundred ten thousand, two hundred eleven".