166160716561 has 8 divisors (see below), whose sum is σ = 189900508544. Its totient is φ = 142421561280.

The previous prime is 166160716559. The next prime is 166160716567. The reversal of 166160716561 is 165617061661.

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 166160716561 - 2¹ = 166160716559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166160716567) 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, 734761 + ... + 933913.

It is an arithmetic number, because the mean of its divisors is an integer number (23737563568).

Almost surely, 2^166160716561 is an apocalyptic number.

It is an amenable number.

166160716561 is a deficient number, since it is larger than the sum of its proper divisors (23739791983).

166160716561 is a wasteful number, since it uses less digits than its factorization.

166160716561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318351.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 166160716561 in words is "one hundred sixty-six billion, one hundred sixty million, seven hundred sixteen thousand, five hundred sixty-one".