666081270263 has 2 divisors, whose sum is σ = 666081270264. Its totient is φ = 666081270262.

The previous prime is 666081270137. The next prime is 666081270277. The reversal of 666081270263 is 362072180666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666081270263 - 2¹⁶ = 666081204727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666081270293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333040635131 + 333040635132.

It is an arithmetic number, because the mean of its divisors is an integer number (333040635132).

Almost surely, 2^666081270263 is an apocalyptic number.

666081270263 is a deficient number, since it is larger than the sum of its proper divisors (1).

666081270263 is an equidigital number, since it uses as much as digits as its factorization.

666081270263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 666081270263 in words is "six hundred sixty-six billion, eighty-one million, two hundred seventy thousand, two hundred sixty-three".