6646430243 has 2 divisors, whose sum is σ = 6646430244. Its totient is φ = 6646430242.

The previous prime is 6646430099. The next prime is 6646430249. The reversal of 6646430243 is 3420346466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6646430243 - 2¹⁰ = 6646429219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6646430197 and 6646430206.

It is not a weakly prime, because it can be changed into another prime (6646430249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3323215121 + 3323215122.

It is an arithmetic number, because the mean of its divisors is an integer number (3323215122).

Almost surely, 2^6646430243 is an apocalyptic number.

6646430243 is a deficient number, since it is larger than the sum of its proper divisors (1).

6646430243 is an equidigital number, since it uses as much as digits as its factorization.

6646430243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 38.

The square root of 6646430243 is about 81525.6416288765. The cubic root of 6646430243 is about 1880.1658072978.

The spelling of 6646430243 in words is "six billion, six hundred forty-six million, four hundred thirty thousand, two hundred forty-three".