2066631161 has 4 divisors (see below), whose sum is σ = 2361864192. Its totient is φ = 1771398132.

The previous prime is 2066631157. The next prime is 2066631181. The reversal of 2066631161 is 1611366602.

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 not a de Polignac number, because 2066631161 - 2² = 2066631157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2066631101) 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, 147616505 + ... + 147616518.

It is an arithmetic number, because the mean of its divisors is an integer number (590466048).

Almost surely, 2^2066631161 is an apocalyptic number.

It is an amenable number.

2066631161 is a deficient number, since it is larger than the sum of its proper divisors (295233031).

2066631161 is an equidigital number, since it uses as much as digits as its factorization.

2066631161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295233030.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 2066631161 is about 45460.2151446735. The cubic root of 2066631161 is about 1273.7601503035.

Adding to 2066631161 its reverse (1611366602), we get a palindrome (3677997763).

The spelling of 2066631161 in words is "two billion, sixty-six million, six hundred thirty-one thousand, one hundred sixty-one".