666627281754383 has 2 divisors, whose sum is σ = 666627281754384. Its totient is φ = 666627281754382.

The previous prime is 666627281754367. The next prime is 666627281754479. The reversal of 666627281754383 is 383457182726666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666627281754383 - 2⁴ = 666627281754367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 666627281754383.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666627281754323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333313640877191 + 333313640877192.

It is an arithmetic number, because the mean of its divisors is an integer number (333313640877192).

Almost surely, 2^{666627281754383} is an apocalyptic number.

666627281754383 is a deficient number, since it is larger than the sum of its proper divisors (1).

666627281754383 is an equidigital number, since it uses as much as digits as its factorization.

666627281754383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2926264320, while the sum is 74.

The spelling of 666627281754383 in words is "six hundred sixty-six trillion, six hundred twenty-seven billion, two hundred eighty-one million, seven hundred fifty-four thousand, three hundred eighty-three".