6668074157 has 2 divisors, whose sum is σ = 6668074158. Its totient is φ = 6668074156.

The previous prime is 6668074129. The next prime is 6668074163. The reversal of 6668074157 is 7514708666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6654317476 + 13756681 = 81574^2 + 3709^2 .

It is a cyclic number.

It is not a de Polignac number, because 6668074157 - 2⁸ = 6668073901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6668074657) 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, 3334037078 + 3334037079.

It is an arithmetic number, because the mean of its divisors is an integer number (3334037079).

Almost surely, 2^6668074157 is an apocalyptic number.

It is an amenable number.

6668074157 is a deficient number, since it is larger than the sum of its proper divisors (1).

6668074157 is an equidigital number, since it uses as much as digits as its factorization.

6668074157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The square root of 6668074157 is about 81658.2767207342. The cubic root of 6668074157 is about 1882.2044983534.

The spelling of 6668074157 in words is "six billion, six hundred sixty-eight million, seventy-four thousand, one hundred fifty-seven".