66650271713 has 2 divisors, whose sum is σ = 66650271714. Its totient is φ = 66650271712.

The previous prime is 66650271707. The next prime is 66650271739. The reversal of 66650271713 is 31717205666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66650199889 + 71824 = 258167^2 + 268^2 .

It is a cyclic number.

It is not a de Polignac number, because 66650271713 - 2⁴ = 66650271697 is a prime.

It is not a weakly prime, because it can be changed into another prime (66650277713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33325135856 + 33325135857.

It is an arithmetic number, because the mean of its divisors is an integer number (33325135857).

Almost surely, 2^66650271713 is an apocalyptic number.

It is an amenable number.

66650271713 is a deficient number, since it is larger than the sum of its proper divisors (1).

66650271713 is an equidigital number, since it uses as much as digits as its factorization.

66650271713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 66650271713 in words is "sixty-six billion, six hundred fifty million, two hundred seventy-one thousand, seven hundred thirteen".