66215114219 has 2 divisors, whose sum is σ = 66215114220. Its totient is φ = 66215114218.

The previous prime is 66215114179. The next prime is 66215114221. The reversal of 66215114219 is 91241151266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66215114219 - 2⁸ = 66215113963 is a prime.

It is a super-2 number, since 2×66215114219² (a number of 22 digits) contains 22 as substring.

Together with 66215114221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66215114239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33107557109 + 33107557110.

It is an arithmetic number, because the mean of its divisors is an integer number (33107557110).

Almost surely, 2^66215114219 is an apocalyptic number.

66215114219 is a deficient number, since it is larger than the sum of its proper divisors (1).

66215114219 is an equidigital number, since it uses as much as digits as its factorization.

66215114219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 38.

The spelling of 66215114219 in words is "sixty-six billion, two hundred fifteen million, one hundred fourteen thousand, two hundred nineteen".