6677749 has 4 divisors (see below), whose sum is σ = 7191436. Its totient is φ = 6164064.

The previous prime is 6677747. The next prime is 6677761. The reversal of 6677749 is 9477766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9477766 = 2 ⋅4738883.

It can be written as a sum of positive squares in 2 ways, for example, as 1188100 + 5489649 = 1090^2 + 2343^2 .

It is a cyclic number.

It is not a de Polignac number, because 6677749 - 2¹ = 6677747 is a prime.

It is a Duffinian number.

6677749 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6677699 and 6677708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6677747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256824 + ... + 256849.

It is an arithmetic number, because the mean of its divisors is an integer number (1797859).

Almost surely, 2^6677749 is an apocalyptic number.

It is an amenable number.

6677749 is a deficient number, since it is larger than the sum of its proper divisors (513687).

6677749 is a wasteful number, since it uses less digits than its factorization.

6677749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513686.

The product of its digits is 444528, while the sum is 46.

The square root of 6677749 is about 2584.1340909481. The cubic root of 6677749 is about 188.3114367909.

It can be divided in two parts, 66 and 77749, that added together give a triangular number (77815 = T₃₉₄).

The spelling of 6677749 in words is "six million, six hundred seventy-seven thousand, seven hundred forty-nine".