159666443 has 8 divisors (see below), whose sum is σ = 168870720. Its totient is φ = 150542280.

The previous prime is 159666421. The next prime is 159666469. The reversal of 159666443 is 344666951.

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

It is a cyclic number.

It is not a de Polignac number, because 159666443 - 2¹⁰ = 159665419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 159666394 and 159666403.

It is not an unprimeable number, because it can be changed into a prime (159666413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15905 + ... + 23922.

It is an arithmetic number, because the mean of its divisors is an integer number (21108840).

Almost surely, 2^159666443 is an apocalyptic number.

159666443 is a deficient number, since it is larger than the sum of its proper divisors (9204277).

159666443 is a wasteful number, since it uses less digits than its factorization.

159666443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40057.

The product of its digits is 466560, while the sum is 44.

The square root of 159666443 is about 12635.9187635882. The cubic root of 159666443 is about 542.5060054408.

The spelling of 159666443 in words is "one hundred fifty-nine million, six hundred sixty-six thousand, four hundred forty-three".