8136666427 has 2 divisors, whose sum is σ = 8136666428. Its totient is φ = 8136666426.

The previous prime is 8136666413. The next prime is 8136666449. The reversal of 8136666427 is 7246666318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8136666427 - 2²³ = 8128277819 is a prime.

It is not a weakly prime, because it can be changed into another prime (8136666407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4068333213 + 4068333214.

It is an arithmetic number, because the mean of its divisors is an integer number (4068333214).

Almost surely, 2^8136666427 is an apocalyptic number.

8136666427 is a deficient number, since it is larger than the sum of its proper divisors (1).

8136666427 is an equidigital number, since it uses as much as digits as its factorization.

8136666427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 49.

The square root of 8136666427 is about 90203.4723666445. The cubic root of 8136666427 is about 2011.3246243294.

The spelling of 8136666427 in words is "eight billion, one hundred thirty-six million, six hundred sixty-six thousand, four hundred twenty-seven".