6778512 has 160 divisors (see below), whose sum is σ = 22498560. Its totient is φ = 1935360.

The previous prime is 6778483. The next prime is 6778517. The reversal of 6778512 is 2158776.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (6778517) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95437 + ... + 95507.

It is an arithmetic number, because the mean of its divisors is an integer number (140616).

Almost surely, 2^6778512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6778512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11249280).

6778512 is an abundant number, since it is smaller than the sum of its proper divisors (15720048).

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

6778512 is a wasteful number, since it uses less digits than its factorization.

6778512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 106 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 6778512 is about 2603.5575661007. The cubic root of 6778512 is about 189.2538790245.

The spelling of 6778512 in words is "six million, seven hundred seventy-eight thousand, five hundred twelve".