2660611663 has 2 divisors, whose sum is σ = 2660611664. Its totient is φ = 2660611662.

The previous prime is 2660611661. The next prime is 2660611693. The reversal of 2660611663 is 3661160662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2660611663 - 2¹ = 2660611661 is a prime.

Together with 2660611661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2660611661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330305831 + 1330305832.

It is an arithmetic number, because the mean of its divisors is an integer number (1330305832).

Almost surely, 2^2660611663 is an apocalyptic number.

2660611663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2660611663 is an equidigital number, since it uses as much as digits as its factorization.

2660611663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 2660611663 is about 51581.1173105042. The cubic root of 2660611663 is about 1385.6721770345.

The spelling of 2660611663 in words is "two billion, six hundred sixty million, six hundred eleven thousand, six hundred sixty-three".