166123005 has 16 divisors (see below), whose sum is σ = 266354304. Its totient is φ = 88413120.

The previous prime is 166122989. The next prime is 166123019. The reversal of 166123005 is 500321661.

It is not a de Polignac number, because 166123005 - 2⁴ = 166122989 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 4066 + ... + 18675.

It is an arithmetic number, because the mean of its divisors is an integer number (16647144).

Almost surely, 2^166123005 is an apocalyptic number.

166123005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166123005 is a deficient number, since it is larger than the sum of its proper divisors (100231299).

166123005 is a wasteful number, since it uses less digits than its factorization.

166123005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23236.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 166123005 is about 12888.8713625360. The cubic root of 166123005 is about 549.7221792476.

Adding to 166123005 its reverse (500321661), we get a palindrome (666444666).

The spelling of 166123005 in words is "one hundred sixty-six million, one hundred twenty-three thousand, five".