6771639 has 8 divisors (see below), whose sum is σ = 10318720. Its totient is φ = 3869496.

The previous prime is 6771631. The next prime is 6771641. The reversal of 6771639 is 9361776.

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

It is not a de Polignac number, because 6771639 - 2³ = 6771631 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6771597 and 6771606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6771631) 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, 161209 + ... + 161250.

It is an arithmetic number, because the mean of its divisors is an integer number (1289840).

Almost surely, 2^6771639 is an apocalyptic number.

6771639 is a deficient number, since it is larger than the sum of its proper divisors (3547081).

6771639 is a wasteful number, since it uses less digits than its factorization.

6771639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322469.

The product of its digits is 47628, while the sum is 39.

The square root of 6771639 is about 2602.2373066267. The cubic root of 6771639 is about 189.1898934092.

The spelling of 6771639 in words is "six million, seven hundred seventy-one thousand, six hundred thirty-nine".