666004050097 has 2 divisors, whose sum is σ = 666004050098. Its totient is φ = 666004050096.

The previous prime is 666004050077. The next prime is 666004050157. The reversal of 666004050097 is 790050400666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 571610090401 + 94393959696 = 756049^2 + 307236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666004050097 is a prime.

It is a super-2 number, since 2×666004050097² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (666004050007) 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, 333002025048 + 333002025049.

It is an arithmetic number, because the mean of its divisors is an integer number (333002025049).

Almost surely, 2^666004050097 is an apocalyptic number.

It is an amenable number.

666004050097 is a deficient number, since it is larger than the sum of its proper divisors (1).

666004050097 is an equidigital number, since it uses as much as digits as its factorization.

666004050097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 666004050097 in words is "six hundred sixty-six billion, four million, fifty thousand, ninety-seven".