160005561661 has 8 divisors (see below), whose sum is σ = 180182216448. Its totient is φ = 140767356000.

The previous prime is 160005561659. The next prime is 160005561689. The reversal of 160005561661 is 166165500061.

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 160005561661 - 2¹ = 160005561659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 160005561661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160005561641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234611920 + ... + 234612601.

It is an arithmetic number, because the mean of its divisors is an integer number (22522777056).

Almost surely, 2^160005561661 is an apocalyptic number.

160005561661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

160005561661 is a deficient number, since it is larger than the sum of its proper divisors (20176654787).

160005561661 is a wasteful number, since it uses less digits than its factorization.

160005561661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469224563.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 160005561661 in words is "one hundred sixty billion, five million, five hundred sixty-one thousand, six hundred sixty-one".