164205566 has 12 divisors (see below), whose sum is σ = 286522128. Its totient is φ = 70373772.

The previous prime is 164205563. The next prime is 164205583. The reversal of 164205566 is 665502461.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164205563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 837686 + ... + 837881.

It is an arithmetic number, because the mean of its divisors is an integer number (23876844).

Almost surely, 2^164205566 is an apocalyptic number.

164205566 is a deficient number, since it is larger than the sum of its proper divisors (122316562).

164205566 is a wasteful number, since it uses less digits than its factorization.

164205566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675583 (or 1675576 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 164205566 is about 12814.2719652737. The cubic root of 164205566 is about 547.5989726762.

The spelling of 164205566 in words is "one hundred sixty-four million, two hundred five thousand, five hundred sixty-six".