666133357 has 2 divisors, whose sum is σ = 666133358. Its totient is φ = 666133356.

The previous prime is 666133271. The next prime is 666133373. The reversal of 666133357 is 753331666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416935561 + 249197796 = 20419^2 + 15786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666133357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666133387) 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, 333066678 + 333066679.

It is an arithmetic number, because the mean of its divisors is an integer number (333066679).

Almost surely, 2^666133357 is an apocalyptic number.

It is an amenable number.

666133357 is a deficient number, since it is larger than the sum of its proper divisors (1).

666133357 is an equidigital number, since it uses as much as digits as its factorization.

666133357 is an odious number, because the sum of its binary digits is odd.

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

The square root of 666133357 is about 25809.5594111949. The cubic root of 666133357 is about 873.3474581397.

The spelling of 666133357 in words is "six hundred sixty-six million, one hundred thirty-three thousand, three hundred fifty-seven".