66425630419 has 2 divisors, whose sum is σ = 66425630420. Its totient is φ = 66425630418.

The previous prime is 66425630417. The next prime is 66425630441. The reversal of 66425630419 is 91403652466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66425630419 - 2¹ = 66425630417 is a prime.

It is a super-2 number, since 2×66425630419² (a number of 22 digits) contains 22 as substring.

Together with 66425630417, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66425630417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33212815209 + 33212815210.

It is an arithmetic number, because the mean of its divisors is an integer number (33212815210).

Almost surely, 2^66425630419 is an apocalyptic number.

66425630419 is a deficient number, since it is larger than the sum of its proper divisors (1).

66425630419 is an equidigital number, since it uses as much as digits as its factorization.

66425630419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 46.

The spelling of 66425630419 in words is "sixty-six billion, four hundred twenty-five million, six hundred thirty thousand, four hundred nineteen".