159239749666 has 48 divisors (see below), whose sum is σ = 261721063656. Its totient is φ = 72595851264.

The previous prime is 159239749663. The next prime is 159239749673. The reversal of 159239749666 is 666947932951.

It can be written as a sum of positive squares in 12 ways, for example, as 100492170025 + 58747579641 = 317005^2 + 242379^2 .

It is a super-2 number, since 2×159239749666² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (159239749663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4966960 + ... + 4998916.

Almost surely, 2^159239749666 is an apocalyptic number.

159239749666 is a deficient number, since it is larger than the sum of its proper divisors (102481313990).

159239749666 is a wasteful number, since it uses less digits than its factorization.

159239749666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32263 (or 32246 counting only the distinct ones).

The product of its digits is 132269760, while the sum is 67.

The spelling of 159239749666 in words is "one hundred fifty-nine billion, two hundred thirty-nine million, seven hundred forty-nine thousand, six hundred sixty-six".