6667788889 has 16 divisors (see below), whose sum is σ = 6913440000. Its totient is φ = 6427699200.

The previous prime is 6667788859. The next prime is 6667788899. The reversal of 6667788889 is 9888877666.

It is a cyclic number.

It is not a de Polignac number, because 6667788889 - 2⁵ = 6667788857 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6667788839) 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 15 ways as a sum of consecutive naturals, for example, 689689 + ... + 699289.

It is an arithmetic number, because the mean of its divisors is an integer number (432090000).

Almost surely, 2^6667788889 is an apocalyptic number.

It is an amenable number.

6667788889 is a deficient number, since it is larger than the sum of its proper divisors (245651111).

6667788889 is a wasteful number, since it uses less digits than its factorization.

6667788889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9888.

The product of its digits is 390168576, while the sum is 73.

The square root of 6667788889 is about 81656.5299838292. The cubic root of 6667788889 is about 1882.1776570018.

The spelling of 6667788889 in words is "six billion, six hundred sixty-seven million, seven hundred eighty-eight thousand, eight hundred eighty-nine".