6647265 has 24 divisors (see below), whose sum is σ = 11950848. Its totient is φ = 3544560.

The previous prime is 6647243. The next prime is 6647269. The reversal of 6647265 is 5627466.

6647265 is a `hidden beast` number, since 6 + 647 + 2 + 6 + 5 = 666.

It is not a de Polignac number, because 6647265 - 2⁸ = 6647009 is a prime.

It is a super-2 number, since 2×6647265² = 88372263960450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6647269) 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, 1521 + ... + 3950.

It is an arithmetic number, because the mean of its divisors is an integer number (497952).

Almost surely, 2^6647265 is an apocalyptic number.

It is an amenable number.

6647265 is a deficient number, since it is larger than the sum of its proper divisors (5303583).

6647265 is an equidigital number, since it uses as much as digits as its factorization.

6647265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5491 (or 5479 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 6647265 is about 2578.2290433551. The cubic root of 6647265 is about 188.0244517012.

The spelling of 6647265 in words is "six million, six hundred forty-seven thousand, two hundred sixty-five".