2665106161 has 4 divisors (see below), whose sum is σ = 2665396800. Its totient is φ = 2664815524.

The previous prime is 2665106131. The next prime is 2665106173. The reversal of 2665106161 is 1616015662.

It is a happy number.

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 cyclic number.

It is not a de Polignac number, because 2665106161 - 2⁷ = 2665106033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2665106131) 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, 131101 + ... + 150058.

It is an arithmetic number, because the mean of its divisors is an integer number (666349200).

Almost surely, 2^2665106161 is an apocalyptic number.

It is an amenable number.

2665106161 is a deficient number, since it is larger than the sum of its proper divisors (290639).

2665106161 is an equidigital number, since it uses as much as digits as its factorization.

2665106161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290638.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 2665106161 is about 51624.6662071533. Note that the first 3 decimals coincide. The cubic root of 2665106161 is about 1386.4519973704.

The spelling of 2665106161 in words is "two billion, six hundred sixty-five million, one hundred six thousand, one hundred sixty-one".