6661702049 has 2 divisors, whose sum is σ = 6661702050. Its totient is φ = 6661702048.

The previous prime is 6661702039. The next prime is 6661702051. The reversal of 6661702049 is 9402071666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4325429824 + 2336272225 = 65768^2 + 48335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6661702049 is a prime.

Together with 6661702051, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6661701997 and 6661702015.

It is not a weakly prime, because it can be changed into another prime (6661702039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330851024 + 3330851025.

It is an arithmetic number, because the mean of its divisors is an integer number (3330851025).

Almost surely, 2^6661702049 is an apocalyptic number.

It is an amenable number.

6661702049 is a deficient number, since it is larger than the sum of its proper divisors (1).

6661702049 is an equidigital number, since it uses as much as digits as its factorization.

6661702049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 6661702049 is about 81619.2504805086. The cubic root of 6661702049 is about 1881.6047533341.

The spelling of 6661702049 in words is "six billion, six hundred sixty-one million, seven hundred two thousand, forty-nine".