666036450501371 has 2 divisors, whose sum is σ = 666036450501372. Its totient is φ = 666036450501370.

The previous prime is 666036450501349. The next prime is 666036450501421. The reversal of 666036450501371 is 173105054630666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666036450501371 - 2¹⁰ = 666036450500347 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (666036450501871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333018225250685 + 333018225250686.

It is an arithmetic number, because the mean of its divisors is an integer number (333018225250686).

Almost surely, 2^{666036450501371} is an apocalyptic number.

666036450501371 is a deficient number, since it is larger than the sum of its proper divisors (1).

666036450501371 is an equidigital number, since it uses as much as digits as its factorization.

666036450501371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8164800, while the sum is 53.

The spelling of 666036450501371 in words is "six hundred sixty-six trillion, thirty-six billion, four hundred fifty million, five hundred one thousand, three hundred seventy-one".