166145634593 has 8 divisors (see below), whose sum is σ = 167680161000. Its totient is φ = 164611294848.

The previous prime is 166145634563. The next prime is 166145634607. The reversal of 166145634593 is 395436541661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 45481107169 + 120664527424 = 213263^2 + 347368^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166145634593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166145634533) 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, 2269205 + ... + 2341277.

It is an arithmetic number, because the mean of its divisors is an integer number (20960020125).

Almost surely, 2^166145634593 is an apocalyptic number.

It is an amenable number.

166145634593 is a deficient number, since it is larger than the sum of its proper divisors (1534526407).

166145634593 is a wasteful number, since it uses less digits than its factorization.

166145634593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93331.

The product of its digits is 6998400, while the sum is 53.

The spelling of 166145634593 in words is "one hundred sixty-six billion, one hundred forty-five million, six hundred thirty-four thousand, five hundred ninety-three".