166023522440123 has 4 divisors (see below), whose sum is σ = 166025553713640. Its totient is φ = 166021491166608.

The previous prime is 166023522440101. The next prime is 166023522440129. The reversal of 166023522440123 is 321044225320661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166023522440123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166023522440129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1015514153 + ... + 1015677626.

It is an arithmetic number, because the mean of its divisors is an integer number (41506388428410).

Almost surely, 2^{166023522440123} is an apocalyptic number.

166023522440123 is a deficient number, since it is larger than the sum of its proper divisors (2031273517).

166023522440123 is an equidigital number, since it uses as much as digits as its factorization.

166023522440123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031273516.

The product of its (nonzero) digits is 414720, while the sum is 41.

Adding to 166023522440123 its reverse (321044225320661), we get a palindrome (487067747760784).

The spelling of 166023522440123 in words is "one hundred sixty-six trillion, twenty-three billion, five hundred twenty-two million, four hundred forty thousand, one hundred twenty-three".