6778004448 has 96 divisors (see below), whose sum is σ = 19097267616. Its totient is φ = 2097266688.

The previous prime is 6778004437. The next prime is 6778004461. The reversal of 6778004448 is 8444008776.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 6778004397 and 6778004406.

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, 90690 + ... + 147582.

It is an arithmetic number, because the mean of its divisors is an integer number (198929871).

Almost surely, 2^6778004448 is an apocalyptic number.

6778004448 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6778004448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9548633808).

6778004448 is an abundant number, since it is smaller than the sum of its proper divisors (12319263168).

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

6778004448 is a wasteful number, since it uses less digits than its factorization.

6778004448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56996 (or 56988 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 48.

The square root of 6778004448 is about 82328.6368647022. The cubic root of 6778004448 is about 1892.4915534362.

The spelling of 6778004448 in words is "six billion, seven hundred seventy-eight million, four thousand, four hundred forty-eight".