66006026541161 has 4 divisors (see below), whose sum is σ = 75435458904192. Its totient is φ = 56576594178132.

The previous prime is 66006026541139. The next prime is 66006026541173. The reversal of 66006026541161 is 16114562060066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-66006026541161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66006025541161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4714716181505 + ... + 4714716181518.

It is an arithmetic number, because the mean of its divisors is an integer number (18858864726048).

Almost surely, 2^{66006026541161} is an apocalyptic number.

It is an amenable number.

66006026541161 is a deficient number, since it is larger than the sum of its proper divisors (9429432363031).

66006026541161 is an equidigital number, since it uses as much as digits as its factorization.

66006026541161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9429432363030.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 66006026541161 in words is "sixty-six trillion, six billion, twenty-six million, five hundred forty-one thousand, one hundred sixty-one".