159866520899 has 4 divisors (see below), whose sum is σ = 159987725040. Its totient is φ = 159745316760.

The previous prime is 159866520887. The next prime is 159866520929. The reversal of 159866520899 is 998025668951.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 159866520899 - 2⁴ = 159866520883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159866520599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60600092 + ... + 60602729.

It is an arithmetic number, because the mean of its divisors is an integer number (39996931260).

Almost surely, 2^159866520899 is an apocalyptic number.

159866520899 is a deficient number, since it is larger than the sum of its proper divisors (121204141).

159866520899 is a wasteful number, since it uses less digits than its factorization.

159866520899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121204140.

The product of its (nonzero) digits is 83980800, while the sum is 68.

The spelling of 159866520899 in words is "one hundred fifty-nine billion, eight hundred sixty-six million, five hundred twenty thousand, eight hundred ninety-nine".