159689668 has 12 divisors (see below), whose sum is σ = 279884332. Its totient is φ = 79722720.

The previous prime is 159689657. The next prime is 159689683. The reversal of 159689668 is 866986951.

It can be written as a sum of positive squares in 2 ways, for example, as 81685444 + 78004224 = 9038^2 + 8832^2 .

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, 27555 + ... + 32842.

Almost surely, 2^159689668 is an apocalyptic number.

It is an amenable number.

159689668 is a deficient number, since it is larger than the sum of its proper divisors (120194664).

159689668 is a wasteful number, since it uses less digits than its factorization.

159689668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61062 (or 61060 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 58.

The square root of 159689668 is about 12636.8377373455. The cubic root of 159689668 is about 542.5323083819.

The spelling of 159689668 in words is "one hundred fifty-nine million, six hundred eighty-nine thousand, six hundred sixty-eight".