165600101659 has 4 divisors (see below), whose sum is σ = 165601355400. Its totient is φ = 165598847920.

The previous prime is 165600101609. The next prime is 165600101669. The reversal of 165600101659 is 956101006561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 956101006561 = 163 ⋅5865650347.

It is a cyclic number.

It is not a de Polignac number, because 165600101659 - 2²⁵ = 165566547227 is a prime.

It is a super-2 number, since 2×165600101659² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165600101609) 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, 401809 + ... + 701890.

It is an arithmetic number, because the mean of its divisors is an integer number (41400338850).

Almost surely, 2^165600101659 is an apocalyptic number.

165600101659 is a deficient number, since it is larger than the sum of its proper divisors (1253741).

165600101659 is a wasteful number, since it uses less digits than its factorization.

165600101659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253740.

The product of its (nonzero) digits is 48600, while the sum is 40.

The spelling of 165600101659 in words is "one hundred sixty-five billion, six hundred million, one hundred one thousand, six hundred fifty-nine".