166056613211 has 4 divisors (see below), whose sum is σ = 166061459424. Its totient is φ = 166051767000.

The previous prime is 166056613187. The next prime is 166056613213. The reversal of 166056613211 is 112316650661.

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 166056613211 - 2⁶ = 166056613147 is a prime.

It is a super-2 number, since 2×166056613211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166056613213) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2371340 + ... + 2440361.

It is an arithmetic number, because the mean of its divisors is an integer number (41515364856).

Almost surely, 2^166056613211 is an apocalyptic number.

166056613211 is a deficient number, since it is larger than the sum of its proper divisors (4846213).

166056613211 is an equidigital number, since it uses as much as digits as its factorization.

166056613211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4846212.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 166056613211 in words is "one hundred sixty-six billion, fifty-six million, six hundred thirteen thousand, two hundred eleven".