6661772774311 has 2 divisors, whose sum is σ = 6661772774312. Its totient is φ = 6661772774310.

The previous prime is 6661772774309. The next prime is 6661772774341. The reversal of 6661772774311 is 1134772771666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6661772774311 - 2¹ = 6661772774309 is a prime.

Together with 6661772774309, 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 (6661772774341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330886387155 + 3330886387156.

It is an arithmetic number, because the mean of its divisors is an integer number (3330886387156).

Almost surely, 2^{6661772774311} is an apocalyptic number.

6661772774311 is a deficient number, since it is larger than the sum of its proper divisors (1).

6661772774311 is an equidigital number, since it uses as much as digits as its factorization.

6661772774311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12446784, while the sum is 58.

The spelling of 6661772774311 in words is "six trillion, six hundred sixty-one billion, seven hundred seventy-two million, seven hundred seventy-four thousand, three hundred eleven".