159561966 has 32 divisors (see below), whose sum is σ = 338508288. Its totient is φ = 49968000.

The previous prime is 159561937. The next prime is 159561977. The reversal of 159561966 is 669165951.

159561966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75561 + ... + 77643.

It is an arithmetic number, because the mean of its divisors is an integer number (10578384).

Almost surely, 2^159561966 is an apocalyptic number.

159561966 is an abundant number, since it is smaller than the sum of its proper divisors (178946322).

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

159561966 is a wasteful number, since it uses less digits than its factorization.

159561966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2856.

The product of its digits is 437400, while the sum is 48.

The square root of 159561966 is about 12631.7839595205. The cubic root of 159561966 is about 542.3876508553.

The spelling of 159561966 in words is "one hundred fifty-nine million, five hundred sixty-one thousand, nine hundred sixty-six".