164561566 has 8 divisors (see below), whose sum is σ = 265830264. Its totient is φ = 75951480.

The previous prime is 164561563. The next prime is 164561569. The reversal of 164561566 is 665165461.

164561566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (164561563) and next prime (164561569).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164561563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3164620 + ... + 3164671.

It is an arithmetic number, because the mean of its divisors is an integer number (33228783).

Almost surely, 2^164561566 is an apocalyptic number.

164561566 is a deficient number, since it is larger than the sum of its proper divisors (101268698).

164561566 is a wasteful number, since it uses less digits than its factorization.

164561566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6329306.

The product of its digits is 129600, while the sum is 40.

The square root of 164561566 is about 12828.1552064200. The cubic root of 164561566 is about 547.9944211519.

The spelling of 164561566 in words is "one hundred sixty-four million, five hundred sixty-one thousand, five hundred sixty-six".