66566552419 has 2 divisors, whose sum is σ = 66566552420. Its totient is φ = 66566552418.

The previous prime is 66566552389. The next prime is 66566552449. The reversal of 66566552419 is 91425566566.

It is a balanced prime because it is at equal distance from previous prime (66566552389) and next prime (66566552449).

It is a cyclic number.

It is not a de Polignac number, because 66566552419 - 2⁵ = 66566552387 is a prime.

It is a super-2 number, since 2×66566552419² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66566552419.

It is not a weakly prime, because it can be changed into another prime (66566552449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33283276209 + 33283276210.

It is an arithmetic number, because the mean of its divisors is an integer number (33283276210).

Almost surely, 2^66566552419 is an apocalyptic number.

66566552419 is a deficient number, since it is larger than the sum of its proper divisors (1).

66566552419 is an equidigital number, since it uses as much as digits as its factorization.

66566552419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664000, while the sum is 55.

The spelling of 66566552419 in words is "sixty-six billion, five hundred sixty-six million, five hundred fifty-two thousand, four hundred nineteen".