6366645 has 12 divisors (see below), whose sum is σ = 11035596. Its totient is φ = 3395520.

The previous prime is 6366643. The next prime is 6366649. The reversal of 6366645 is 5466636.

6366645 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3359889 + 3006756 = 1833^2 + 1734^2 .

It is not a de Polignac number, because 6366645 - 2¹ = 6366643 is a prime.

6366645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6366643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70696 + ... + 70785.

It is an arithmetic number, because the mean of its divisors is an integer number (919633).

Almost surely, 2^6366645 is an apocalyptic number.

It is an amenable number.

6366645 is a deficient number, since it is larger than the sum of its proper divisors (4668951).

6366645 is a wasteful number, since it uses less digits than its factorization.

6366645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141492 (or 141489 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 6366645 is about 2523.2211555866. The cubic root of 6366645 is about 185.3404493096.

Subtracting from 6366645 its reverse (5466636), we obtain a palindrome (900009).

The spelling of 6366645 in words is "six million, three hundred sixty-six thousand, six hundred forty-five".