6777381 has 8 divisors (see below), whose sum is σ = 9731680. Its totient is φ = 4170672.

The previous prime is 6777367. The next prime is 6777413. The reversal of 6777381 is 1837776.

6777381 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6777381 - 2⁵ = 6777349 is a prime.

It is a super-3 number, since 3×6777381³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 173779 = 6777381 / (6 + 7 + 7 + 7 + 3 + 8 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6777181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86851 + ... + 86928.

It is an arithmetic number, because the mean of its divisors is an integer number (1216460).

Almost surely, 2^6777381 is an apocalyptic number.

It is an amenable number.

6777381 is a deficient number, since it is larger than the sum of its proper divisors (2954299).

6777381 is a wasteful number, since it uses less digits than its factorization.

6777381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173795.

The product of its digits is 49392, while the sum is 39.

The square root of 6777381 is about 2603.3403542372. The cubic root of 6777381 is about 189.2433527201.

The spelling of 6777381 in words is "six million, seven hundred seventy-seven thousand, three hundred eighty-one".