158766 has 16 divisors (see below), whose sum is σ = 324864. Its totient is φ = 51704.

The previous prime is 158761. The next prime is 158771. The reversal of 158766 is 667851.

158766 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

158766 is a nontrivial binomial coefficient, being equal to C(564, 2).

It is an interprime number because it is at equal distance from previous prime (158761) and next prime (158771).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158761) 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, 1 + ... + 563.

It is an arithmetic number, because the mean of its divisors is an integer number (20304).

2¹⁵⁸⁷⁶⁶ is an apocalyptic number.

158766 is the 563-rd triangular number and also the 282-nd hexagonal number.

158766 is an abundant number, since it is smaller than the sum of its proper divisors (166098).

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

158766 is a wasteful number, since it uses less digits than its factorization.

158766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615.

The product of its digits is 10080, while the sum is 33.

The square root of 158766 is about 398.4545143426. The cubic root of 158766 is about 54.1484256791.

It can be divided in two parts, 1587 and 66, that added together give a triangular number (1653 = T₅₇).

The spelling of 158766 in words is "one hundred fifty-eight thousand, seven hundred sixty-six".