2656165669 has 2 divisors, whose sum is σ = 2656165670. Its totient is φ = 2656165668.

The previous prime is 2656165609. The next prime is 2656165679. The reversal of 2656165669 is 9665616562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2656165444 + 225 = 51538^2 + 15^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656165669 - 2⁷ = 2656165541 is a prime.

It is a super-2 number, since 2×2656165669² = 14110432122348435122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2656165609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328082834 + 1328082835.

It is an arithmetic number, because the mean of its divisors is an integer number (1328082835).

Almost surely, 2^2656165669 is an apocalyptic number.

It is an amenable number.

2656165669 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656165669 is an equidigital number, since it uses as much as digits as its factorization.

2656165669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3499200, while the sum is 52.

The square root of 2656165669 is about 51538.0021828553. The cubic root of 2656165669 is about 1384.8999078791.

The spelling of 2656165669 in words is "two billion, six hundred fifty-six million, one hundred sixty-five thousand, six hundred sixty-nine".