6661772774341 has 2 divisors, whose sum is σ = 6661772774342. Its totient is φ = 6661772774340.

The previous prime is 6661772774311. The next prime is 6661772774353. The reversal of 6661772774341 is 1434772771666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6660993192100 + 779582241 = 2580890^2 + 27921^2 .

It is a cyclic number.

It is not a de Polignac number, because 6661772774341 - 2⁵ = 6661772774309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6661772774341.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6661772774311) 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, 3330886387170 + 3330886387171.

It is an arithmetic number, because the mean of its divisors is an integer number (3330886387171).

Almost surely, 2^{6661772774341} is an apocalyptic number.

It is an amenable number.

6661772774341 is a deficient number, since it is larger than the sum of its proper divisors (1).

6661772774341 is an equidigital number, since it uses as much as digits as its factorization.

6661772774341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49787136, while the sum is 61.

The spelling of 6661772774341 in words is "six trillion, six hundred sixty-one billion, seven hundred seventy-two million, seven hundred seventy-four thousand, three hundred forty-one".