6658436243 has 2 divisors, whose sum is σ = 6658436244. Its totient is φ = 6658436242.

The previous prime is 6658436201. The next prime is 6658436249. The reversal of 6658436243 is 3426348566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6658436243 - 2¹² = 6658432147 is a prime.

It is not a weakly prime, because it can be changed into another prime (6658436249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3329218121 + 3329218122.

It is an arithmetic number, because the mean of its divisors is an integer number (3329218122).

Almost surely, 2^6658436243 is an apocalyptic number.

6658436243 is a deficient number, since it is larger than the sum of its proper divisors (1).

6658436243 is an equidigital number, since it uses as much as digits as its factorization.

6658436243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2488320, while the sum is 47.

The square root of 6658436243 is about 81599.2416815254. The cubic root of 6658436243 is about 1881.2972262946.

The spelling of 6658436243 in words is "six billion, six hundred fifty-eight million, four hundred thirty-six thousand, two hundred forty-three".