166512005 has 32 divisors (see below), whose sum is σ = 228842496. Its totient is φ = 115200000.

The previous prime is 166512001. The next prime is 166512011. The reversal of 166512005 is 500215661.

166512005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166512005 - 2² = 166512001 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166512001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103205 + ... + 104805.

It is an arithmetic number, because the mean of its divisors is an integer number (7151328).

Almost surely, 2^166512005 is an apocalyptic number.

It is an amenable number.

166512005 is a deficient number, since it is larger than the sum of its proper divisors (62330491).

166512005 is a wasteful number, since it uses less digits than its factorization.

166512005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 166512005 is about 12903.9530764801. The cubic root of 166512005 is about 550.1509282762.

Adding to 166512005 its reverse (500215661), we get a palindrome (666727666).

The spelling of 166512005 in words is "one hundred sixty-six million, five hundred twelve thousand, five".