6647289499 has 4 divisors (see below), whose sum is σ = 6756261520. Its totient is φ = 6538317480.

The previous prime is 6647289497. The next prime is 6647289511. The reversal of 6647289499 is 9949827466.

It is a happy number.

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 6647289499 - 2¹ = 6647289497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6647289499.

It is not an unprimeable number, because it can be changed into a prime (6647289497) 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 3 ways as a sum of consecutive naturals, for example, 54485919 + ... + 54486040.

It is an arithmetic number, because the mean of its divisors is an integer number (1689065380).

Almost surely, 2^6647289499 is an apocalyptic number.

6647289499 is a deficient number, since it is larger than the sum of its proper divisors (108972021).

6647289499 is a wasteful number, since it uses less digits than its factorization.

6647289499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108972020.

The product of its digits is 47029248, while the sum is 64.

The square root of 6647289499 is about 81530.9113097603. The cubic root of 6647289499 is about 1880.2468269368.

The spelling of 6647289499 in words is "six billion, six hundred forty-seven million, two hundred eighty-nine thousand, four hundred ninety-nine".