666159 has 32 divisors (see below), whose sum is σ = 1075200. Its totient is φ = 362880.

The previous prime is 666143. The next prime is 666167. The reversal of 666159 is 951666.

666159 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 666159 - 2⁴ = 666143 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21474 + ... + 21504.

It is an arithmetic number, because the mean of its divisors is an integer number (33600).

2⁶⁶⁶¹⁵⁹ is an apocalyptic number.

666159 is a deficient number, since it is larger than the sum of its proper divisors (409041).

666159 is a wasteful number, since it uses less digits than its factorization.

666159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95.

The product of its digits is 9720, while the sum is 33.

The square root of 666159 is about 816.1856406480. The cubic root of 666159 is about 87.3358664585.

The spelling of 666159 in words is "six hundred sixty-six thousand, one hundred fifty-nine".