164566644 has 48 divisors (see below), whose sum is σ = 420650496. Its totient is φ = 49660000.

The previous prime is 164566627. The next prime is 164566663. The reversal of 164566644 is 446665461.

It is a junction number, because it is equal to n+sod(n) for n = 164566596 and 164566605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30649 + ... + 35615.

It is an arithmetic number, because the mean of its divisors is an integer number (8763552).

Almost surely, 2^164566644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 164566644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210325248).

164566644 is an abundant number, since it is smaller than the sum of its proper divisors (256083852).

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

164566644 is a wasteful number, since it uses less digits than its factorization.

164566644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5236 (or 5234 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 164566644 is about 12828.3531289094. The cubic root of 164566644 is about 548.0000577193. Note that the first 4 decimals are identical.

The spelling of 164566644 in words is "one hundred sixty-four million, five hundred sixty-six thousand, six hundred forty-four".