6646245 has 16 divisors (see below), whose sum is σ = 10977792. Its totient is φ = 3430080.

The previous prime is 6646231. The next prime is 6646247. The reversal of 6646245 is 5426466.

It is not a de Polignac number, because 6646245 - 2¹² = 6642149 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646247) 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, 6682 + ... + 7611.

It is an arithmetic number, because the mean of its divisors is an integer number (686112).

Almost surely, 2^6646245 is an apocalyptic number.

It is an amenable number.

6646245 is a deficient number, since it is larger than the sum of its proper divisors (4331547).

6646245 is a wasteful number, since it uses less digits than its factorization.

6646245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14332.

The product of its digits is 34560, while the sum is 33.

The square root of 6646245 is about 2578.0312255673. The cubic root of 6646245 is about 188.0148339736.

The spelling of 6646245 in words is "six million, six hundred forty-six thousand, two hundred forty-five".