6663331057 has 2 divisors, whose sum is σ = 6663331058. Its totient is φ = 6663331056.

The previous prime is 6663331019. The next prime is 6663331079. The reversal of 6663331057 is 7501333666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4004484961 + 2658846096 = 63281^2 + 51564^2 .

It is a cyclic number.

It is not a de Polignac number, because 6663331057 - 2¹⁹ = 6662806769 is a prime.

It is not a weakly prime, because it can be changed into another prime (6663331007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3331665528 + 3331665529.

It is an arithmetic number, because the mean of its divisors is an integer number (3331665529).

Almost surely, 2^6663331057 is an apocalyptic number.

It is an amenable number.

6663331057 is a deficient number, since it is larger than the sum of its proper divisors (1).

6663331057 is an equidigital number, since it uses as much as digits as its factorization.

6663331057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 40.

The square root of 6663331057 is about 81629.2291829342. The cubic root of 6663331057 is about 1881.7581125088.

The spelling of 6663331057 in words is "six billion, six hundred sixty-three million, three hundred thirty-one thousand, fifty-seven".