666982802273 has 2 divisors, whose sum is σ = 666982802274. Its totient is φ = 666982802272.

The previous prime is 666982802249. The next prime is 666982802329. The reversal of 666982802273 is 372208289666.

666982802273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 575059838929 + 91922963344 = 758327^2 + 303188^2 .

It is a cyclic number.

It is not a de Polignac number, because 666982802273 - 2¹⁶ = 666982736737 is a prime.

It is not a weakly prime, because it can be changed into another prime (666982805273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333491401136 + 333491401137.

It is an arithmetic number, because the mean of its divisors is an integer number (333491401137).

Almost surely, 2^666982802273 is an apocalyptic number.

It is an amenable number.

666982802273 is a deficient number, since it is larger than the sum of its proper divisors (1).

666982802273 is an equidigital number, since it uses as much as digits as its factorization.

666982802273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20901888, while the sum is 59.

The spelling of 666982802273 in words is "six hundred sixty-six billion, nine hundred eighty-two million, eight hundred two thousand, two hundred seventy-three".