164323566 has 120 divisors (see below), whose sum is σ = 413654472. Its totient is φ = 48708000.

The previous prime is 164323519. The next prime is 164323573. The reversal of 164323566 is 665323461.

164323566 is a `hidden beast` number, since 1 + 64 + 32 + 3 + 566 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 164323566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1626916 + ... + 1627016.

Almost surely, 2^164323566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 164323566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206827236).

164323566 is an abundant number, since it is smaller than the sum of its proper divisors (249330906).

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

164323566 is a wasteful number, since it uses less digits than its factorization.

164323566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 200 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 164323566 is about 12818.8753796891. The cubic root of 164323566 is about 547.7301115659.

The spelling of 164323566 in words is "one hundred sixty-four million, three hundred twenty-three thousand, five hundred sixty-six".