165662344321 has 8 divisors (see below), whose sum is σ = 171115193088. Its totient is φ = 160216302000.

The previous prime is 165662344271. The next prime is 165662344327. The reversal of 165662344321 is 123443266561.

It is a happy number.

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 165662344321 - 2²¹ = 165660247169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165662344327) 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, 1652110 + ... + 1749511.

It is an arithmetic number, because the mean of its divisors is an integer number (21389399136).

Almost surely, 2^165662344321 is an apocalyptic number.

It is an amenable number.

165662344321 is a deficient number, since it is larger than the sum of its proper divisors (5452848767).

165662344321 is a wasteful number, since it uses less digits than its factorization.

165662344321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3403223.

The product of its digits is 622080, while the sum is 43.

The spelling of 165662344321 in words is "one hundred sixty-five billion, six hundred sixty-two million, three hundred forty-four thousand, three hundred twenty-one".