639166703017 has 2 divisors, whose sum is σ = 639166703018. Its totient is φ = 639166703016.

The previous prime is 639166702963. The next prime is 639166703057. The reversal of 639166703017 is 710307661936.

639166703017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 445077113881 + 194089589136 = 667141^2 + 440556^2 .

It is a cyclic number.

It is not a de Polignac number, because 639166703017 - 2¹⁵ = 639166670249 is a prime.

It is not a weakly prime, because it can be changed into another prime (639166703057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319583351508 + 319583351509.

It is an arithmetic number, because the mean of its divisors is an integer number (319583351509).

Almost surely, 2^639166703017 is an apocalyptic number.

It is an amenable number.

639166703017 is a deficient number, since it is larger than the sum of its proper divisors (1).

639166703017 is an equidigital number, since it uses as much as digits as its factorization.

639166703017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 49.

The spelling of 639166703017 in words is "six hundred thirty-nine billion, one hundred sixty-six million, seven hundred three thousand, seventeen".