6777009 has 6 divisors (see below), whose sum is σ = 9789026. Its totient is φ = 4518000.

The previous prime is 6777007. The next prime is 6777011. The reversal of 6777009 is 9007776.

It is an interprime number because it is at equal distance from previous prime (6777007) and next prime (6777011).

It can be written as a sum of positive squares in only one way, i.e., 5832225 + 944784 = 2415^2 + 972^2 .

It is not a de Polignac number, because 6777009 - 2¹ = 6777007 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 (6777007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 376492 + ... + 376509.

Almost surely, 2^6777009 is an apocalyptic number.

It is an amenable number.

6777009 is a deficient number, since it is larger than the sum of its proper divisors (3012017).

6777009 is a wasteful number, since it uses less digits than its factorization.

6777009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753007 (or 753004 counting only the distinct ones).

The product of its (nonzero) digits is 18522, while the sum is 36.

The square root of 6777009 is about 2603.2689065865. The cubic root of 6777009 is about 189.2398902314.

The spelling of 6777009 in words is "six million, seven hundred seventy-seven thousand, nine".