2646661517 has 2 divisors, whose sum is σ = 2646661518. Its totient is φ = 2646661516.

The previous prime is 2646661417. The next prime is 2646661531. The reversal of 2646661517 is 7151666462.

2646661517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1399582921 + 1247078596 = 37411^2 + 35314^2 .

It is a cyclic number.

It is not a de Polignac number, because 2646661517 - 2⁸ = 2646661261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2646661417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1323330758 + 1323330759.

It is an arithmetic number, because the mean of its divisors is an integer number (1323330759).

Almost surely, 2^2646661517 is an apocalyptic number.

It is an amenable number.

2646661517 is a deficient number, since it is larger than the sum of its proper divisors (1).

2646661517 is an equidigital number, since it uses as much as digits as its factorization.

2646661517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 44.

The square root of 2646661517 is about 51445.7142724251. The cubic root of 2646661517 is about 1383.2461418827.

The spelling of 2646661517 in words is "two billion, six hundred forty-six million, six hundred sixty-one thousand, five hundred seventeen".