166425123 has 16 divisors (see below), whose sum is σ = 234644480. Its totient is φ = 104631264.

The previous prime is 166425107. The next prime is 166425137. The reversal of 166425123 is 321524661.

It is not a de Polignac number, because 166425123 - 2⁴ = 166425107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166425163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6165 + ... + 19257.

It is an arithmetic number, because the mean of its divisors is an integer number (14665280).

Almost surely, 2^166425123 is an apocalyptic number.

166425123 is a deficient number, since it is larger than the sum of its proper divisors (68219357).

166425123 is a wasteful number, since it uses less digits than its factorization.

166425123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13338.

The product of its digits is 8640, while the sum is 30.

The square root of 166425123 is about 12900.5861494740. The cubic root of 166425123 is about 550.0552264104.

Adding to 166425123 its reverse (321524661), we get a palindrome (487949784).

The spelling of 166425123 in words is "one hundred sixty-six million, four hundred twenty-five thousand, one hundred twenty-three".