166556151011 has 16 divisors (see below), whose sum is σ = 172072460160. Its totient is φ = 161133198720.

The previous prime is 166556150983. The next prime is 166556151059. The reversal of 166556151011 is 110151655661.

It is a happy number.

166556151011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 166556151011 - 2⁶ = 166556150947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166556151071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3210821 + ... + 3262281.

It is an arithmetic number, because the mean of its divisors is an integer number (10754528760).

Almost surely, 2^166556151011 is an apocalyptic number.

166556151011 is a deficient number, since it is larger than the sum of its proper divisors (5516309149).

166556151011 is an equidigital number, since it uses as much as digits as its factorization.

166556151011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52366.

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 166556151011 in words is "one hundred sixty-six billion, five hundred fifty-six million, one hundred fifty-one thousand, eleven".