6677778888 has 64 divisors (see below), whose sum is σ = 20235700800. Its totient is φ = 2023568640.

The previous prime is 6677778881. The next prime is 6677778889. The reversal of 6677778888 is 8888777766.

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 not an unprimeable number, because it can be changed into a prime (6677778881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1402881 + ... + 1407632.

It is an arithmetic number, because the mean of its divisors is an integer number (316182825).

Almost surely, 2^6677778888 is an apocalyptic number.

It is an amenable number.

6677778888 is an abundant number, since it is smaller than the sum of its proper divisors (13557921912).

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

6677778888 is a wasteful number, since it uses less digits than its factorization.

6677778888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810539 (or 2810529 counting only the distinct ones).

The product of its digits is 354041856, while the sum is 72.

The square root of 6677778888 is about 81717.6779405778. The cubic root of 6677778888 is about 1883.1171773605.

The spelling of 6677778888 in words is "six billion, six hundred seventy-seven million, seven hundred seventy-eight thousand, eight hundred eighty-eight".