2660136666427 has 2 divisors, whose sum is σ = 2660136666428. Its totient is φ = 2660136666426.

The previous prime is 2660136666409. The next prime is 2660136666521. The reversal of 2660136666427 is 7246666310662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2660136666427 - 2¹¹ = 2660136664379 is a prime.

It is not a weakly prime, because it can be changed into another prime (2660136667427) 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, 1330068333213 + 1330068333214.

It is an arithmetic number, because the mean of its divisors is an integer number (1330068333214).

Almost surely, 2^{2660136666427} is an apocalyptic number.

2660136666427 is a deficient number, since it is larger than the sum of its proper divisors (1).

2660136666427 is an equidigital number, since it uses as much as digits as its factorization.

2660136666427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15676416, while the sum is 55.

The spelling of 2660136666427 in words is "two trillion, six hundred sixty billion, one hundred thirty-six million, six hundred sixty-six thousand, four hundred twenty-seven".