166706530 has 64 divisors (see below), whose sum is σ = 327794688. Its totient is φ = 60857280.

The previous prime is 166706521. The next prime is 166706531. The reversal of 166706530 is 35607661.

It is a happy number.

166706530 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with 161088158 it forms an amicable pair .

It is not an unprimeable number, because it can be changed into a prime (166706531) 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, 734277 + ... + 734503.

It is an arithmetic number, because the mean of its divisors is an integer number (5121792).

Almost surely, 2^166706530 is an apocalyptic number.

166706530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166706530 is a deficient number, since it is larger than the sum of its proper divisors (161088158).

166706530 is a wasteful number, since it uses less digits than its factorization.

166706530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 166706530 is about 12911.4882953128. The cubic root of 166706530 is about 550.3650799271.

The spelling of 166706530 in words is "one hundred sixty-six million, seven hundred six thousand, five hundred thirty".