6643702838467 has 2 divisors, whose sum is σ = 6643702838468. Its totient is φ = 6643702838466.

The previous prime is 6643702838429. The next prime is 6643702838489. The reversal of 6643702838467 is 7648382073466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6643702838467 - 2²⁷ = 6643568620739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6643702838399 and 6643702838408.

It is not a weakly prime, because it can be changed into another prime (6643702838497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3321851419233 + 3321851419234.

It is an arithmetic number, because the mean of its divisors is an integer number (3321851419234).

Almost surely, 2^{6643702838467} is an apocalyptic number.

6643702838467 is a deficient number, since it is larger than the sum of its proper divisors (1).

6643702838467 is an equidigital number, since it uses as much as digits as its factorization.

6643702838467 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 195084288, while the sum is 64.

The spelling of 6643702838467 in words is "six trillion, six hundred forty-three billion, seven hundred two million, eight hundred thirty-eight thousand, four hundred sixty-seven".