158668 has 6 divisors (see below), whose sum is σ = 277676. Its totient is φ = 79332.

The previous prime is 158663. The next prime is 158699. The reversal of 158668 is 866851.

It is a happy number.

It is a plaindrome in base 16.

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 as a sum of consecutive naturals, namely, 19830 + ... + 19837.

2¹⁵⁸⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

158668 is a deficient number, since it is larger than the sum of its proper divisors (119008).

158668 is a wasteful number, since it uses less digits than its factorization.

158668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39671 (or 39669 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 158668 is about 398.3315202190. The cubic root of 158668 is about 54.1372821556.

The spelling of 158668 in words is "one hundred fifty-eight thousand, six hundred sixty-eight".