66230876161 has 4 divisors (see below), whose sum is σ = 66277225300. Its totient is φ = 66184527024.

The previous prime is 66230876099. The next prime is 66230876203. The reversal of 66230876161 is 16167803266.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5024116161 + 61206760000 = 70881^2 + 247400^2 .

It is a cyclic number.

It is not a de Polignac number, because 66230876161 - 2¹¹ = 66230874113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66230874161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23172426 + ... + 23175283.

It is an arithmetic number, because the mean of its divisors is an integer number (16569306325).

Almost surely, 2^66230876161 is an apocalyptic number.

It is an amenable number.

66230876161 is a deficient number, since it is larger than the sum of its proper divisors (46349139).

66230876161 is a wasteful number, since it uses less digits than its factorization.

66230876161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46349138.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 66230876161 in words is "sixty-six billion, two hundred thirty million, eight hundred seventy-six thousand, one hundred sixty-one".