8426666247 has 8 divisors (see below), whose sum is σ = 11237014656. Its totient is φ = 5617047672.

The previous prime is 8426666203. The next prime is 8426666249. The reversal of 8426666247 is 7426666248.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8426666247 - 2¹⁹ = 8426141959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8426666247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8426666249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154923 + ... + 202124.

It is an arithmetic number, because the mean of its divisors is an integer number (1404626832).

Almost surely, 2^8426666247 is an apocalyptic number.

8426666247 is a deficient number, since it is larger than the sum of its proper divisors (2810348409).

8426666247 is a wasteful number, since it uses less digits than its factorization.

8426666247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364917.

The product of its digits is 4644864, while the sum is 51.

The square root of 8426666247 is about 91796.8749304681. The cubic root of 8426666247 is about 2034.9415109551.

Subtracting from 8426666247 its reverse (7426666248), we obtain a palindrome (999999999).

The spelling of 8426666247 in words is "eight billion, four hundred twenty-six million, six hundred sixty-six thousand, two hundred forty-seven".