6667788888 has 64 divisors (see below), whose sum is σ = 18694800000. Its totient is φ = 2201816736.

The previous prime is 6667788859. The next prime is 6667788899. The reversal of 6667788888 is 8888877666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121138 + ... + 167361.

It is an arithmetic number, because the mean of its divisors is an integer number (292106250).

Almost surely, 2^6667788888 is an apocalyptic number.

It is an amenable number.

6667788888 is an abundant number, since it is smaller than the sum of its proper divisors (12027011112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6667788888 is a wasteful number, since it uses less digits than its factorization.

6667788888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288621 (or 288611 counting only the distinct ones).

The product of its digits is 346816512, while the sum is 72.

The square root of 6667788888 is about 81656.5299777060. The cubic root of 6667788888 is about 1882.1776569077.

The spelling of 6667788888 in words is "six billion, six hundred sixty-seven million, seven hundred eighty-eight thousand, eight hundred eighty-eight".