164542266 has 80 divisors (see below), whose sum is σ = 431766720. Its totient is φ = 45852480.

The previous prime is 164542249. The next prime is 164542267. The reversal of 164542266 is 662245461.

164542266 is a `hidden beast` number, since 1 + 645 + 4 + 2 + 2 + 6 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 164542266.

It is not an unprimeable number, because it can be changed into a prime (164542267) 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 39 ways as a sum of consecutive naturals, for example, 44725 + ... + 48263.

It is an arithmetic number, because the mean of its divisors is an integer number (5397084).

Almost surely, 2^164542266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 164542266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215883360).

164542266 is an abundant number, since it is smaller than the sum of its proper divisors (267224454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164542266 is a wasteful number, since it uses less digits than its factorization.

164542266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3601 (or 3592 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 164542266 is about 12827.4029327842. The cubic root of 164542266 is about 547.9729971421.

The spelling of 164542266 in words is "one hundred sixty-four million, five hundred forty-two thousand, two hundred sixty-six".