8134385866 has 16 divisors (see below), whose sum is σ = 12368953800. Its totient is φ = 4011625728.

The previous prime is 8134385863. The next prime is 8134385891. The reversal of 8134385866 is 6685834318.

It can be written as a sum of positive squares in 4 ways, for example, as 7692167025 + 442218841 = 87705^2 + 21029^2 .

It is not an unprimeable number, because it can be changed into a prime (8134385863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16936 + ... + 128668.

Almost surely, 2^8134385866 is an apocalyptic number.

8134385866 is a deficient number, since it is larger than the sum of its proper divisors (4234567934).

8134385866 is a wasteful number, since it uses less digits than its factorization.

8134385866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112233.

The product of its digits is 3317760, while the sum is 52.

The square root of 8134385866 is about 90190.8302766972. The cubic root of 8134385866 is about 2011.1366940858.

The spelling of 8134385866 in words is "eight billion, one hundred thirty-four million, three hundred eighty-five thousand, eight hundred sixty-six".