164640266 has 16 divisors (see below), whose sum is σ = 285815040. Its totient is φ = 69666480.

The previous prime is 164640251. The next prime is 164640271. The reversal of 164640266 is 662046461.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73325 + ... + 75536.

It is an arithmetic number, because the mean of its divisors is an integer number (17863440).

Almost surely, 2^164640266 is an apocalyptic number.

164640266 is a deficient number, since it is larger than the sum of its proper divisors (121174774).

164640266 is a wasteful number, since it uses less digits than its factorization.

164640266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148949.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 164640266 is about 12831.2223112220. Note that the first 3 decimals coincide. The cubic root of 164640266 is about 548.0817649321.

The spelling of 164640266 in words is "one hundred sixty-four million, six hundred forty thousand, two hundred sixty-six".