158664 has 32 divisors (see below), whose sum is σ = 433440. Its totient is φ = 48000.

The previous prime is 158663. The next prime is 158699. The reversal of 158664 is 466851.

158664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 158664.

It is not an unprimeable number, because it can be changed into a prime (158663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37 + ... + 564.

It is an arithmetic number, because the mean of its divisors is an integer number (13545).

2¹⁵⁸⁶⁶⁴ 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 158664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216720).

158664 is an abundant number, since it is smaller than the sum of its proper divisors (274776).

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

158664 is a wasteful number, since it uses less digits than its factorization.

158664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621 (or 617 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 158664 is about 398.3264992440. The cubic root of 158664 is about 54.1368272205.

The spelling of 158664 in words is "one hundred fifty-eight thousand, six hundred sixty-four".