666788888299 has 2 divisors, whose sum is σ = 666788888300. Its totient is φ = 666788888298.

The previous prime is 666788888291. The next prime is 666788888317. The reversal of 666788888299 is 992888887666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666788888299 - 2³ = 666788888291 is a prime.

It is a super-2 number, since 2×666788888299² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (666788888291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333394444149 + 333394444150.

It is an arithmetic number, because the mean of its divisors is an integer number (333394444150).

Almost surely, 2^666788888299 is an apocalyptic number.

666788888299 is a deficient number, since it is larger than the sum of its proper divisors (1).

666788888299 is an equidigital number, since it uses as much as digits as its factorization.

666788888299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8026324992, while the sum is 85.

The spelling of 666788888299 in words is "six hundred sixty-six billion, seven hundred eighty-eight million, eight hundred eighty-eight thousand, two hundred ninety-nine".