8166530816573 has 8 divisors (see below), whose sum is σ = 8378145005496. Its totient is φ = 7955508556800.

The previous prime is 8166530816569. The next prime is 8166530816629. The reversal of 8166530816573 is 3756180356618.

It can be written as a sum of positive squares in 4 ways, for example, as 587180440729 + 7579350375844 = 766277^2 + 2753062^2 .

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 8166530816573 - 2² = 8166530816569 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8166530816513) 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, 147954338 + ... + 148009523.

It is an arithmetic number, because the mean of its divisors is an integer number (1047268125687).

Almost surely, 2^{8166530816573} is an apocalyptic number.

It is an amenable number.

8166530816573 is a deficient number, since it is larger than the sum of its proper divisors (211614188923).

8166530816573 is a wasteful number, since it uses less digits than its factorization.

8166530816573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295964575.

The product of its (nonzero) digits is 21772800, while the sum is 59.

The spelling of 8166530816573 in words is "eight trillion, one hundred sixty-six billion, five hundred thirty million, eight hundred sixteen thousand, five hundred seventy-three".