6775645 has 4 divisors (see below), whose sum is σ = 8130780. Its totient is φ = 5420512.

The previous prime is 6775633. The next prime is 6775663. The reversal of 6775645 is 5465776.

It is a happy number.

6775645 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 can be written as a sum of positive squares in 2 ways, for example, as 2424249 + 4351396 = 1557^2 + 2086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6775645 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6775598 and 6775607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677560 + ... + 677569.

It is an arithmetic number, because the mean of its divisors is an integer number (2032695).

Almost surely, 2^6775645 is an apocalyptic number.

It is an amenable number.

6775645 is a deficient number, since it is larger than the sum of its proper divisors (1355135).

6775645 is a wasteful number, since it uses less digits than its factorization.

6775645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355134.

The product of its digits is 176400, while the sum is 40.

The square root of 6775645 is about 2603.0069150888. The cubic root of 6775645 is about 189.2271933553.

The spelling of 6775645 in words is "six million, seven hundred seventy-five thousand, six hundred forty-five".