166506729 has 16 divisors (see below), whose sum is σ = 232507392. Its totient is φ = 105790608.

The previous prime is 166506701. The next prime is 166506737. The reversal of 166506729 is 927605661.

It is not a de Polignac number, because 166506729 - 2²⁴ = 149729513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166506929) 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, 15264 + ... + 23790.

It is an arithmetic number, because the mean of its divisors is an integer number (14531712).

Almost surely, 2^166506729 is an apocalyptic number.

It is an amenable number.

166506729 is a deficient number, since it is larger than the sum of its proper divisors (66000663).

166506729 is a wasteful number, since it uses less digits than its factorization.

166506729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8836.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 166506729 is about 12903.7486413832. The cubic root of 166506729 is about 550.1451176302.

The spelling of 166506729 in words is "one hundred sixty-six million, five hundred six thousand, seven hundred twenty-nine".