6606645 has 8 divisors (see below), whose sum is σ = 10570656. Its totient is φ = 3523536.

The previous prime is 6606641. The next prime is 6606647. The reversal of 6606645 is 5466066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6606645 - 2² = 6606641 is a prime.

6606645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6606641) 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 7 ways as a sum of consecutive naturals, for example, 220207 + ... + 220236.

It is an arithmetic number, because the mean of its divisors is an integer number (1321332).

Almost surely, 2^6606645 is an apocalyptic number.

It is an amenable number.

6606645 is a deficient number, since it is larger than the sum of its proper divisors (3964011).

6606645 is a wasteful number, since it uses less digits than its factorization.

6606645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440451.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 6606645 is about 2570.3394717430. The cubic root of 6606645 is about 187.6406766496.

It can be divided in two parts, 6 and 606645, that added together give a triangular number (606651 = T₁₁₀₁).

The spelling of 6606645 in words is "six million, six hundred six thousand, six hundred forty-five".