2656640227 has 2 divisors, whose sum is σ = 2656640228. Its totient is φ = 2656640226.

The previous prime is 2656640209. The next prime is 2656640237. The reversal of 2656640227 is 7220466562.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2656640227 is a prime.

It is a super-2 number, since 2×2656640227² = 14115474591429223058, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2656640227.

It is not a weakly prime, because it can be changed into another prime (2656640237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328320113 + 1328320114.

It is an arithmetic number, because the mean of its divisors is an integer number (1328320114).

Almost surely, 2^2656640227 is an apocalyptic number.

2656640227 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656640227 is an equidigital number, since it uses as much as digits as its factorization.

2656640227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 40.

The square root of 2656640227 is about 51542.6059391645. The cubic root of 2656640227 is about 1384.9823796670.

The spelling of 2656640227 in words is "two billion, six hundred fifty-six million, six hundred forty thousand, two hundred twenty-seven".