6779887 has 4 divisors (see below), whose sum is σ = 6840000. Its totient is φ = 6719776.

The previous prime is 6779863. The next prime is 6779911. The reversal of 6779887 is 7889776.

It is a happy number.

6779887 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6779863) and next prime (6779911).

It is a cyclic number.

It is not a de Polignac number, because 6779887 - 2¹¹ = 6777839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6779807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29887 + ... + 30112.

It is an arithmetic number, because the mean of its divisors is an integer number (1710000).

Almost surely, 2^6779887 is an apocalyptic number.

6779887 is a deficient number, since it is larger than the sum of its proper divisors (60113).

6779887 is a wasteful number, since it uses less digits than its factorization.

6779887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60112.

The product of its digits is 1185408, while the sum is 52.

The square root of 6779887 is about 2603.8216144736. The cubic root of 6779887 is about 189.2666746789.

The spelling of 6779887 in words is "six million, seven hundred seventy-nine thousand, eight hundred eighty-seven".