8136666727 has 6 divisors (see below), whose sum is σ = 9465102168. Its totient is φ = 6974285724.

The previous prime is 8136666673. The next prime is 8136666731. The reversal of 8136666727 is 7276666318.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-8136666727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8136666427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83027163 + ... + 83027260.

It is an arithmetic number, because the mean of its divisors is an integer number (1577517028).

Almost surely, 2^8136666727 is an apocalyptic number.

8136666727 is a deficient number, since it is larger than the sum of its proper divisors (1328435441).

8136666727 is a wasteful number, since it uses less digits than its factorization.

8136666727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166054437 (or 166054430 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 52.

The square root of 8136666727 is about 90203.4740295517. The cubic root of 8136666727 is about 2011.3246490486.

The spelling of 8136666727 in words is "eight billion, one hundred thirty-six million, six hundred sixty-six thousand, seven hundred twenty-seven".