159966 has 12 divisors (see below), whose sum is σ = 346632. Its totient is φ = 53316.

The previous prime is 159937. The next prime is 159977. The reversal of 159966 is 669951.

159966 is a `hidden beast` number, since 1 + 599 + 66 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 159966.

It is a congruent number.

It is an unprimeable number.

159966 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4426 + ... + 4461.

It is an arithmetic number, because the mean of its divisors is an integer number (28886).

2¹⁵⁹⁹⁶⁶ is an apocalyptic number.

159966 is an abundant number, since it is smaller than the sum of its proper divisors (186666).

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

159966 is a wasteful number, since it uses less digits than its factorization.

159966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8895 (or 8892 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 159966 is about 399.9574977419. The cubic root of 159966 is about 54.2845066345.

The spelling of 159966 in words is "one hundred fifty-nine thousand, nine hundred sixty-six".