66560445043619 has 2 divisors, whose sum is σ = 66560445043620. Its totient is φ = 66560445043618.

The previous prime is 66560445043579. The next prime is 66560445043639. The reversal of 66560445043619 is 91634054406566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66560445043619 is a prime.

It is a super-2 number, since 2×66560445043619² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66560445043639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33280222521809 + 33280222521810.

It is an arithmetic number, because the mean of its divisors is an integer number (33280222521810).

Almost surely, 2^{66560445043619} is an apocalyptic number.

66560445043619 is a deficient number, since it is larger than the sum of its proper divisors (1).

66560445043619 is an equidigital number, since it uses as much as digits as its factorization.

66560445043619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55987200, while the sum is 59.

The spelling of 66560445043619 in words is "sixty-six trillion, five hundred sixty billion, four hundred forty-five million, forty-three thousand, six hundred nineteen".