395668866613 has 2 divisors, whose sum is σ = 395668866614. Its totient is φ = 395668866612.

The previous prime is 395668866569. The next prime is 395668866617. The reversal of 395668866613 is 316668866593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 395619614289 + 49252324 = 628983^2 + 7018^2 .

It is a cyclic number.

It is not a de Polignac number, because 395668866613 - 2¹⁷ = 395668735541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (395668866617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197834433306 + 197834433307.

It is an arithmetic number, because the mean of its divisors is an integer number (197834433307).

Almost surely, 2^395668866613 is an apocalyptic number.

It is an amenable number.

395668866613 is a deficient number, since it is larger than the sum of its proper divisors (1).

395668866613 is an equidigital number, since it uses as much as digits as its factorization.

395668866613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201553920, while the sum is 67.

The spelling of 395668866613 in words is "three hundred ninety-five billion, six hundred sixty-eight million, eight hundred sixty-six thousand, six hundred thirteen".