6646242017 has 2 divisors, whose sum is σ = 6646242018. Its totient is φ = 6646242016.

The previous prime is 6646241951. The next prime is 6646242037. The reversal of 6646242017 is 7102426466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6639642256 + 6599761 = 81484^2 + 2569^2 .

It is a cyclic number.

It is not a de Polignac number, because 6646242017 - 2²⁶ = 6579133153 is a prime.

It is not a weakly prime, because it can be changed into another prime (6646242037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3323121008 + 3323121009.

It is an arithmetic number, because the mean of its divisors is an integer number (3323121009).

Almost surely, 2^6646242017 is an apocalyptic number.

It is an amenable number.

6646242017 is a deficient number, since it is larger than the sum of its proper divisors (1).

6646242017 is an equidigital number, since it uses as much as digits as its factorization.

6646242017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 6646242017 is about 81524.4872231650. The cubic root of 6646242017 is about 1880.1480584503.

The spelling of 6646242017 in words is "six billion, six hundred forty-six million, two hundred forty-two thousand, seventeen".