12660355619 has 2 divisors, whose sum is σ = 12660355620. Its totient is φ = 12660355618.

The previous prime is 12660355613. The next prime is 12660355649. The reversal of 12660355619 is 91655306621.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12660355619 is a prime.

It is a super-2 number, since 2×12660355619² (a number of 21 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 12660355619.

It is not a weakly prime, because it can be changed into another prime (12660355613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6330177809 + 6330177810.

It is an arithmetic number, because the mean of its divisors is an integer number (6330177810).

Almost surely, 2^12660355619 is an apocalyptic number.

12660355619 is a deficient number, since it is larger than the sum of its proper divisors (1).

12660355619 is an equidigital number, since it uses as much as digits as its factorization.

12660355619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 12660355619 in words is "twelve billion, six hundred sixty million, three hundred fifty-five thousand, six hundred nineteen".