2665161227 has 4 divisors (see below), whose sum is σ = 2668400400. Its totient is φ = 2661922056.

The previous prime is 2665161211. The next prime is 2665161283. The reversal of 2665161227 is 7221615662.

2665161227 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2665161227 - 2⁴ = 2665161211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2665161287) 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, 1618352 + ... + 1619997.

It is an arithmetic number, because the mean of its divisors is an integer number (667100100).

Almost surely, 2^2665161227 is an apocalyptic number.

2665161227 is a deficient number, since it is larger than the sum of its proper divisors (3239173).

2665161227 is an equidigital number, since it uses as much as digits as its factorization.

2665161227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3239172.

The product of its digits is 60480, while the sum is 38.

The square root of 2665161227 is about 51625.1995347234. The cubic root of 2665161227 is about 1386.4615461882.

Adding to 2665161227 its reverse (7221615662), we get a palindrome (9886776889).

It can be divided in two parts, 26651 and 61227, that added together give a palindrome (87878).

The spelling of 2665161227 in words is "two billion, six hundred sixty-five million, one hundred sixty-one thousand, two hundred twenty-seven".