6661134420277 has 2 divisors, whose sum is σ = 6661134420278. Its totient is φ = 6661134420276.

The previous prime is 6661134420251. The next prime is 6661134420289. The reversal of 6661134420277 is 7720244311666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6155365962001 + 505768458276 = 2481001^2 + 711174^2 .

It is a cyclic number.

It is not a de Polignac number, because 6661134420277 - 2³⁵ = 6626774681909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6661134420277.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6661134420217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330567210138 + 3330567210139.

It is an arithmetic number, because the mean of its divisors is an integer number (3330567210139).

Almost surely, 2^{6661134420277} is an apocalyptic number.

It is an amenable number.

6661134420277 is a deficient number, since it is larger than the sum of its proper divisors (1).

6661134420277 is an equidigital number, since it uses as much as digits as its factorization.

6661134420277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 49.

The spelling of 6661134420277 in words is "six trillion, six hundred sixty-one billion, one hundred thirty-four million, four hundred twenty thousand, two hundred seventy-seven".