6777440 has 24 divisors (see below), whose sum is σ = 16012080. Its totient is φ = 2710912.

The previous prime is 6777413. The next prime is 6777443. The reversal of 6777440 is 447776.

It is a self number, because there is not a number n which added to its sum of digits gives 6777440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6777443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21020 + ... + 21339.

It is an arithmetic number, because the mean of its divisors is an integer number (667170).

Almost surely, 2^6777440 is an apocalyptic number.

It is an amenable number.

6777440 is an abundant number, since it is smaller than the sum of its proper divisors (9234640).

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

6777440 is a wasteful number, since it uses less digits than its factorization.

6777440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42374 (or 42366 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 35.

The square root of 6777440 is about 2603.3516858081. The cubic root of 6777440 is about 189.2439018666.

The spelling of 6777440 in words is "six million, seven hundred seventy-seven thousand, four hundred forty".