166506005 has 8 divisors (see below), whose sum is σ = 202621824. Its totient is φ = 131328400.

The previous prime is 166506001. The next prime is 166506013. The reversal of 166506005 is 500605661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166506005 - 2² = 166506001 is a prime.

It is a Duffinian 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 (166506001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234161 + ... + 234870.

It is an arithmetic number, because the mean of its divisors is an integer number (25327728).

Almost surely, 2^166506005 is an apocalyptic number.

It is an amenable number.

166506005 is a deficient number, since it is larger than the sum of its proper divisors (36115819).

166506005 is an equidigital number, since it uses as much as digits as its factorization.

166506005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469107.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 166506005 is about 12903.7205874895. The cubic root of 166506005 is about 550.1443202537.

The spelling of 166506005 in words is "one hundred sixty-six million, five hundred six thousand, five".