8387666669 has 4 divisors (see below), whose sum is σ = 8881058844. Its totient is φ = 7894274496.

The previous prime is 8387666663. The next prime is 8387666687. The reversal of 8387666669 is 9666667838.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6406081444 + 1981585225 = 80038^2 + 44515^2 .

It is not a de Polignac number, because 8387666669 - 2⁴ = 8387666653 is a prime.

It is a super-2 number, since 2×8387666669² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8387666663) 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, 246696062 + ... + 246696095.

It is an arithmetic number, because the mean of its divisors is an integer number (2220264711).

Almost surely, 2^8387666669 is an apocalyptic number.

It is an amenable number.

8387666669 is a deficient number, since it is larger than the sum of its proper divisors (493392175).

8387666669 is a wasteful number, since it uses less digits than its factorization.

8387666669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493392174.

The product of its digits is 94058496, while the sum is 65.

The square root of 8387666669 is about 91584.2053467736. The cubic root of 8387666669 is about 2031.7973411830.

The spelling of 8387666669 in words is "eight billion, three hundred eighty-seven million, six hundred sixty-six thousand, six hundred sixty-nine".