6776778 has 48 divisors (see below), whose sum is σ = 15050880. Its totient is φ = 2026752.

The previous prime is 6776773. The next prime is 6776779. The reversal of 6776778 is 8776776.

It is a super-2 number, since 2×6776778² = 91849440122568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6776771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85743 + ... + 85821.

It is an arithmetic number, because the mean of its divisors is an integer number (313560).

Almost surely, 2^6776778 is an apocalyptic number.

6776778 is an abundant number, since it is smaller than the sum of its proper divisors (8274102).

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

6776778 is a wasteful number, since it uses less digits than its factorization.

6776778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 130 counting only the distinct ones).

The product of its digits is 691488, while the sum is 48.

The square root of 6776778 is about 2603.2245389132. The cubic root of 6776778 is about 189.2377400738.

The spelling of 6776778 in words is "six million, seven hundred seventy-six thousand, seven hundred seventy-eight".