2660078017 has 2 divisors, whose sum is σ = 2660078018. Its totient is φ = 2660078016.

The previous prime is 2660077933. The next prime is 2660078021. The reversal of 2660078017 is 7108700662.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2065157136 + 594920881 = 45444^2 + 24391^2 .

It is a cyclic number.

It is not a de Polignac number, because 2660078017 - 2²³ = 2651689409 is a prime.

It is not a weakly prime, because it can be changed into another prime (2660078117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330039008 + 1330039009.

It is an arithmetic number, because the mean of its divisors is an integer number (1330039009).

Almost surely, 2^2660078017 is an apocalyptic number.

It is an amenable number.

2660078017 is a deficient number, since it is larger than the sum of its proper divisors (1).

2660078017 is an equidigital number, since it uses as much as digits as its factorization.

2660078017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 2660078017 is about 51575.9441697387. The cubic root of 2660078017 is about 1385.5795281813.

Adding to 2660078017 its reverse (7108700662), we get a palindrome (9768778679).

The spelling of 2660078017 in words is "two billion, six hundred sixty million, seventy-eight thousand, seventeen".