159861566 has 8 divisors (see below), whose sum is σ = 240788064. Its totient is φ = 79598880.

The previous prime is 159861551. The next prime is 159861577. The reversal of 159861566 is 665168951.

159861566 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 159861566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165350 + ... + 166313.

It is an arithmetic number, because the mean of its divisors is an integer number (30098508).

Almost surely, 2^159861566 is an apocalyptic number.

159861566 is a deficient number, since it is larger than the sum of its proper divisors (80926498).

159861566 is a wasteful number, since it uses less digits than its factorization.

159861566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331906.

The product of its digits is 388800, while the sum is 47.

The square root of 159861566 is about 12643.6373722122. The cubic root of 159861566 is about 542.7269082717.

The spelling of 159861566 in words is "one hundred fifty-nine million, eight hundred sixty-one thousand, five hundred sixty-six".