6613664263 has 2 divisors, whose sum is σ = 6613664264. Its totient is φ = 6613664262.

The previous prime is 6613664261. The next prime is 6613664311. The reversal of 6613664263 is 3624663166.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6613664263 - 2¹ = 6613664261 is a prime.

Together with 6613664261, 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 (6613664261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3306832131 + 3306832132.

It is an arithmetic number, because the mean of its divisors is an integer number (3306832132).

Almost surely, 2^6613664263 is an apocalyptic number.

6613664263 is a deficient number, since it is larger than the sum of its proper divisors (1).

6613664263 is an equidigital number, since it uses as much as digits as its factorization.

6613664263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 43.

The square root of 6613664263 is about 81324.4382888686. The cubic root of 6613664263 is about 1877.0710638718.

The spelling of 6613664263 in words is "six billion, six hundred thirteen million, six hundred sixty-four thousand, two hundred sixty-three".