6644265 has 16 divisors (see below), whose sum is σ = 10665600. Its totient is φ = 3532032.

The previous prime is 6644227. The next prime is 6644269. The reversal of 6644265 is 5624466.

It is not a de Polignac number, because 6644265 - 2¹⁵ = 6611497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6644269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6081 + ... + 7089.

It is an arithmetic number, because the mean of its divisors is an integer number (666600).

Almost surely, 2^6644265 is an apocalyptic number.

It is an amenable number.

6644265 is a deficient number, since it is larger than the sum of its proper divisors (4021335).

6644265 is a wasteful number, since it uses less digits than its factorization.

6644265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456.

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

The square root of 6644265 is about 2577.6471829946. The cubic root of 6644265 is about 187.9961614578.

It can be divided in two parts, 6 and 644265, that multiplied together give a triangular number (3865590 = T₂₇₈₀).

The spelling of 6644265 in words is "six million, six hundred forty-four thousand, two hundred sixty-five".