164239566 has 8 divisors (see below), whose sum is σ = 328479144. Its totient is φ = 54746520.

The previous prime is 164239501. The next prime is 164239583. The reversal of 164239566 is 665932461.

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

164239566 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13686625 + ... + 13686636.

It is an arithmetic number, because the mean of its divisors is an integer number (41059893).

Almost surely, 2^164239566 is an apocalyptic number.

164239566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

164239566 is a wasteful number, since it uses less digits than its factorization.

164239566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27373266.

The product of its digits is 233280, while the sum is 42.

The square root of 164239566 is about 12815.5985424014. The cubic root of 164239566 is about 547.6367648993.

It can be divided in two parts, 1642395 and 66, that added together give a palindrome (1642461).

The spelling of 164239566 in words is "one hundred sixty-four million, two hundred thirty-nine thousand, five hundred sixty-six".