166522821203 has 16 divisors (see below), whose sum is σ = 177882034176. Its totient is φ = 155522986080.

The previous prime is 166522821181. The next prime is 166522821251. The reversal of 166522821203 is 302128225661.

It is a happy number.

It is not a de Polignac number, because 166522821203 - 2¹² = 166522817107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166522821253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272150 + ... + 638052.

It is an arithmetic number, because the mean of its divisors is an integer number (11117627136).

Almost surely, 2^166522821203 is an apocalyptic number.

166522821203 is a deficient number, since it is larger than the sum of its proper divisors (11359212973).

166522821203 is a wasteful number, since it uses less digits than its factorization.

166522821203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366394.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 166522821203 in words is "one hundred sixty-six billion, five hundred twenty-two million, eight hundred twenty-one thousand, two hundred three".