6645465 has 24 divisors (see below), whose sum is σ = 11718720. Its totient is φ = 3482784.

The previous prime is 6645461. The next prime is 6645467. The reversal of 6645465 is 5645466.

It is a happy number.

6645465 is a `hidden beast` number, since 6 + 645 + 4 + 6 + 5 = 666.

It is not a de Polignac number, because 6645465 - 2² = 6645461 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6645461) 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 23 ways as a sum of consecutive naturals, for example, 1404 + ... + 3906.

It is an arithmetic number, because the mean of its divisors is an integer number (488280).

Almost surely, 2^6645465 is an apocalyptic number.

It is an amenable number.

6645465 is a deficient number, since it is larger than the sum of its proper divisors (5073255).

6645465 is a wasteful number, since it uses less digits than its factorization.

6645465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573 (or 2570 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 6645465 is about 2577.8799428988. The cubic root of 6645465 is about 188.0074785768.

Subtracting from 6645465 its reverse (5645466), we obtain a palindrome (999999).

The spelling of 6645465 in words is "six million, six hundred forty-five thousand, four hundred sixty-five".