66495118243 has 2 divisors, whose sum is σ = 66495118244. Its totient is φ = 66495118242.

The previous prime is 66495118241. The next prime is 66495118253. The reversal of 66495118243 is 34281159466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66495118243 - 2¹ = 66495118241 is a prime.

Together with 66495118241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66495118241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33247559121 + 33247559122.

It is an arithmetic number, because the mean of its divisors is an integer number (33247559122).

Almost surely, 2^66495118243 is an apocalyptic number.

66495118243 is a deficient number, since it is larger than the sum of its proper divisors (1).

66495118243 is an equidigital number, since it uses as much as digits as its factorization.

66495118243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 49.

The spelling of 66495118243 in words is "sixty-six billion, four hundred ninety-five million, one hundred eighteen thousand, two hundred forty-three".