2665222161 has 32 divisors (see below), whose sum is σ = 4149446400. Its totient is φ = 1521047808.

The previous prime is 2665222151. The next prime is 2665222171. The reversal of 2665222161 is 1612225662.

It is an interprime number because it is at equal distance from previous prime (2665222151) and next prime (2665222171).

It is not a de Polignac number, because 2665222161 - 2⁷ = 2665222033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2665222151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1333615 + ... + 1335611.

It is an arithmetic number, because the mean of its divisors is an integer number (129670200).

Almost surely, 2^2665222161 is an apocalyptic number.

2665222161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2665222161 is a deficient number, since it is larger than the sum of its proper divisors (1484224239).

2665222161 is a wasteful number, since it uses less digits than its factorization.

2665222161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3318 (or 3304 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 2665222161 is about 51625.7896888755. The cubic root of 2665222161 is about 1386.4721124038.

The spelling of 2665222161 in words is "two billion, six hundred sixty-five million, two hundred twenty-two thousand, one hundred sixty-one".