6705645 has 16 divisors (see below), whose sum is σ = 10912320. Its totient is φ = 3515264.

The previous prime is 6705619. The next prime is 6705649. The reversal of 6705645 is 5465076.

It is a cyclic number.

It is not a de Polignac number, because 6705645 - 2⁸ = 6705389 is a prime.

It is a super-3 number, since 3×6705645³ (a number of 21 digits) contains 333 as substring.

6705645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6705649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2904 + ... + 4673.

It is an arithmetic number, because the mean of its divisors is an integer number (682020).

Almost surely, 2^6705645 is an apocalyptic number.

It is an amenable number.

6705645 is a deficient number, since it is larger than the sum of its proper divisors (4206675).

6705645 is a wasteful number, since it uses less digits than its factorization.

6705645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7644.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 6705645 is about 2589.5260184057. The cubic root of 6705645 is about 188.5732933864.

The spelling of 6705645 in words is "six million, seven hundred five thousand, six hundred forty-five".