165859966159 has 8 divisors (see below), whose sum is σ = 172097393792. Its totient is φ = 159677982720.

The previous prime is 165859966127. The next prime is 165859966199. The reversal of 165859966159 is 951669958561.

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 165859966159 - 2⁵ = 165859966127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165859966199) 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, 13854954 + ... + 13866919.

It is an arithmetic number, because the mean of its divisors is an integer number (21512174224).

Almost surely, 2^165859966159 is an apocalyptic number.

165859966159 is a deficient number, since it is larger than the sum of its proper divisors (6237427633).

165859966159 is a wasteful number, since it uses less digits than its factorization.

165859966159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27722097.

The product of its digits is 157464000, while the sum is 70.

The spelling of 165859966159 in words is "one hundred sixty-five billion, eight hundred fifty-nine million, nine hundred sixty-six thousand, one hundred fifty-nine".