66158 has 8 divisors (see below), whose sum is σ = 104520. Its totient is φ = 31320.

The previous prime is 66137. The next prime is 66161. The reversal of 66158 is 85166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833 + ... + 908.

It is an arithmetic number, because the mean of its divisors is an integer number (13065).

2⁶⁶¹⁵⁸ is an apocalyptic number.

66158 is a deficient number, since it is larger than the sum of its proper divisors (38362).

66158 is a wasteful number, since it uses less digits than its factorization.

66158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762.

The product of its digits is 1440, while the sum is 26.

The square root of 66158 is about 257.2119748379. The cubic root of 66158 is about 40.4446227859. Note that the first 3 decimals are identical.

The spelling of 66158 in words is "sixty-six thousand, one hundred fifty-eight".