66706710419 has 2 divisors, whose sum is σ = 66706710420. Its totient is φ = 66706710418.

The previous prime is 66706710391. The next prime is 66706710437. The reversal of 66706710419 is 91401760766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66706710419 - 2¹² = 66706706323 is a prime.

It is a super-2 number, since 2×66706710419² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66706719419) 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, 33353355209 + 33353355210.

It is an arithmetic number, because the mean of its divisors is an integer number (33353355210).

Almost surely, 2^66706710419 is an apocalyptic number.

66706710419 is a deficient number, since it is larger than the sum of its proper divisors (1).

66706710419 is an equidigital number, since it uses as much as digits as its factorization.

66706710419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 66706710419 in words is "sixty-six billion, seven hundred six million, seven hundred ten thousand, four hundred nineteen".