6662245 has 4 divisors (see below), whose sum is σ = 7994700. Its totient is φ = 5329792.

The previous prime is 6662233. The next prime is 6662281. The reversal of 6662245 is 5422666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5422666 = 2 ⋅2711333.

It can be written as a sum of positive squares in 2 ways, for example, as 2765569 + 3896676 = 1663^2 + 1974^2 .

It is a cyclic number.

It is not a de Polignac number, because 6662245 - 2¹¹ = 6660197 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 666220 + ... + 666229.

It is an arithmetic number, because the mean of its divisors is an integer number (1998675).

Almost surely, 2^6662245 is an apocalyptic number.

It is an amenable number.

6662245 is a deficient number, since it is larger than the sum of its proper divisors (1332455).

6662245 is a wasteful number, since it uses less digits than its factorization.

6662245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332454.

The product of its digits is 17280, while the sum is 31.

The square root of 6662245 is about 2581.1325033791. The cubic root of 6662245 is about 188.1655870972.

The spelling of 6662245 in words is "six million, six hundred sixty-two thousand, two hundred forty-five".