666982802329 has 2 divisors, whose sum is σ = 666982802330. Its totient is φ = 666982802328.

The previous prime is 666982802273. The next prime is 666982802351. The reversal of 666982802329 is 923208289666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 470667346704 + 196315455625 = 686052^2 + 443075^2 .

It is a cyclic number.

It is not a de Polignac number, because 666982802329 - 2¹⁵ = 666982769561 is a prime.

It is not a weakly prime, because it can be changed into another prime (666982802929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333491401164 + 333491401165.

It is an arithmetic number, because the mean of its divisors is an integer number (333491401165).

Almost surely, 2^666982802329 is an apocalyptic number.

It is an amenable number.

666982802329 is a deficient number, since it is larger than the sum of its proper divisors (1).

666982802329 is an equidigital number, since it uses as much as digits as its factorization.

666982802329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26873856, while the sum is 61.

The spelling of 666982802329 in words is "six hundred sixty-six billion, nine hundred eighty-two million, eight hundred two thousand, three hundred twenty-nine".