6778127790 has 192 divisors, whose sum is σ = 21398307840. Its totient is φ = 1511343360.

The previous prime is 6778127729. The next prime is 6778127801. The reversal of 6778127790 is 977218776.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 692551 + ... + 702269.

It is an arithmetic number, because the mean of its divisors is an integer number (111449520).

Almost surely, 2^6778127790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6778127790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10699153920).

6778127790 is an abundant number, since it is smaller than the sum of its proper divisors (14620180050).

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

6778127790 is a wasteful number, since it uses less digits than its factorization.

6778127790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9789 (or 9777 counting only the distinct ones).

The product of its (nonzero) digits is 2074464, while the sum is 54.

The square root of 6778127790 is about 82329.3859445095. The cubic root of 6778127790 is about 1892.5030328364.

The spelling of 6778127790 in words is "six billion, seven hundred seventy-eight million, one hundred twenty-seven thousand, seven hundred ninety".