6666767057 has 2 divisors, whose sum is σ = 6666767058. Its totient is φ = 6666767056.

The previous prime is 6666767011. The next prime is 6666767059. The reversal of 6666767057 is 7507676666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5093534161 + 1573232896 = 71369^2 + 39664^2 .

It is a cyclic number.

It is not a de Polignac number, because 6666767057 - 2¹⁰ = 6666766033 is a prime.

Together with 6666767059, 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 = 6666766993 and 6666767011.

It is not a weakly prime, because it can be changed into another prime (6666767059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333383528 + 3333383529.

It is an arithmetic number, because the mean of its divisors is an integer number (3333383529).

Almost surely, 2^6666767057 is an apocalyptic number.

It is an amenable number.

6666767057 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666767057 is an equidigital number, since it uses as much as digits as its factorization.

6666767057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13335840, while the sum is 56.

The square root of 6666767057 is about 81650.2728531877. The cubic root of 6666767057 is about 1882.0815048067.

The spelling of 6666767057 in words is "six billion, six hundred sixty-six million, seven hundred sixty-seven thousand, fifty-seven".