2656661017 has 2 divisors, whose sum is σ = 2656661018. Its totient is φ = 2656661016.

The previous prime is 2656660973. The next prime is 2656661039. The reversal of 2656661017 is 7101666562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2121155136 + 535505881 = 46056^2 + 23141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2656661017 is a prime.

It is not a weakly prime, because it can be changed into another prime (2656661047) 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, 1328330508 + 1328330509.

It is an arithmetic number, because the mean of its divisors is an integer number (1328330509).

Almost surely, 2^2656661017 is an apocalyptic number.

It is an amenable number.

2656661017 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656661017 is an equidigital number, since it uses as much as digits as its factorization.

2656661017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 2656661017 is about 51542.8076165822. The cubic root of 2656661017 is about 1384.9859924643.

The spelling of 2656661017 in words is "two billion, six hundred fifty-six million, six hundred sixty-one thousand, seventeen".