158667 has 4 divisors (see below), whose sum is σ = 211560. Its totient is φ = 105776.

The previous prime is 158663. The next prime is 158699. The reversal of 158667 is 766851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 766851 = 3 ⋅255617.

It is a cyclic number.

It is not a de Polignac number, because 158667 - 2² = 158663 is a prime.

It is a D-number.

158667 is a lucky number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26442 + ... + 26447.

It is an arithmetic number, because the mean of its divisors is an integer number (52890).

2¹⁵⁸⁶⁶⁷ is an apocalyptic number.

158667 is a deficient number, since it is larger than the sum of its proper divisors (52893).

158667 is an equidigital number, since it uses as much as digits as its factorization.

158667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52892.

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

The square root of 158667 is about 398.3302649812. The cubic root of 158667 is about 54.1371684226.

It can be divided in two parts, 1586 and 67, that added together give a triangular number (1653 = T₅₇).

The spelling of 158667 in words is "one hundred fifty-eight thousand, six hundred sixty-seven".