166706605 has 16 divisors (see below), whose sum is σ = 215712000. Its totient is φ = 122948928.

The previous prime is 166706597. The next prime is 166706609. The reversal of 166706605 is 506607661.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 166706605 - 2³ = 166706597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166706609) 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, 82396 + ... + 84394.

It is an arithmetic number, because the mean of its divisors is an integer number (13482000).

Almost surely, 2^166706605 is an apocalyptic number.

It is an amenable number.

166706605 is a deficient number, since it is larger than the sum of its proper divisors (49005395).

166706605 is a wasteful number, since it uses less digits than its factorization.

166706605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 166706605 is about 12911.4911997027. The cubic root of 166706605 is about 550.3651624621.

The spelling of 166706605 in words is "one hundred sixty-six million, seven hundred six thousand, six hundred five".