8666688419 has 4 divisors (see below), whose sum is σ = 8830210896. Its totient is φ = 8503165944.

The previous prime is 8666688413. The next prime is 8666688449. The reversal of 8666688419 is 9148866668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8666688419 - 2⁴ = 8666688403 is a prime.

It is a super-2 number, since 2×8666688419² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8666688413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81761159 + ... + 81761264.

It is an arithmetic number, because the mean of its divisors is an integer number (2207552724).

Almost surely, 2^8666688419 is an apocalyptic number.

8666688419 is a deficient number, since it is larger than the sum of its proper divisors (163522477).

8666688419 is a wasteful number, since it uses less digits than its factorization.

8666688419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163522476.

The product of its digits is 23887872, while the sum is 62.

The square root of 8666688419 is about 93095.0504538238. The cubic root of 8666688419 is about 2054.0817677495.

The spelling of 8666688419 in words is "eight billion, six hundred sixty-six million, six hundred eighty-eight thousand, four hundred nineteen".