8336638666 has 16 divisors (see below), whose sum is σ = 12691971648. Its totient is φ = 4106082400.

The previous prime is 8336638663. The next prime is 8336638669. The reversal of 8336638666 is 6668366338.

It is an interprime number because it is at equal distance from previous prime (8336638663) and next prime (8336638669).

It is not an unprimeable number, because it can be changed into a prime (8336638663) 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, 144801 + ... + 194011.

It is an arithmetic number, because the mean of its divisors is an integer number (793248228).

Almost surely, 2^8336638666 is an apocalyptic number.

8336638666 is a deficient number, since it is larger than the sum of its proper divisors (4355332982).

8336638666 is a wasteful number, since it uses less digits than its factorization.

8336638666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50477.

The product of its digits is 13436928, while the sum is 55.

The square root of 8336638666 is about 91305.1951753020. The cubic root of 8336638666 is about 2027.6686791051.

The spelling of 8336638666 in words is "eight billion, three hundred thirty-six million, six hundred thirty-eight thousand, six hundred sixty-six".