6645315 has 24 divisors (see below), whose sum is σ = 11010384. Its totient is φ = 3422400.

The previous prime is 6645313. The next prime is 6645319. The reversal of 6645315 is 5135466.

It is not a de Polignac number, because 6645315 - 2¹ = 6645313 is a prime.

It is a super-2 number, since 2×6645315² = 88320422898450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6645313) 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 23 ways as a sum of consecutive naturals, for example, 14185 + ... + 14645.

It is an arithmetic number, because the mean of its divisors is an integer number (458766).

Almost surely, 2^6645315 is an apocalyptic number.

6645315 is a deficient number, since it is larger than the sum of its proper divisors (4365069).

6645315 is a wasteful number, since it uses less digits than its factorization.

6645315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531 (or 500 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 6645315 is about 2577.8508490601. The cubic root of 6645315 is about 188.0060640114.

The spelling of 6645315 in words is "six million, six hundred forty-five thousand, three hundred fifteen".