6528665 has 32 divisors (see below), whose sum is σ = 9628416. Its totient is φ = 4181760.

The previous prime is 6528659. The next prime is 6528671. The reversal of 6528665 is 5668256.

It is a happy number.

6528665 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6528659) and next prime (6528671).

It is not a de Polignac number, because 6528665 - 2⁴ = 6528649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 16247 + ... + 16643.

It is an arithmetic number, because the mean of its divisors is an integer number (300888).

Almost surely, 2^6528665 is an apocalyptic number.

6528665 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6528665 is a deficient number, since it is larger than the sum of its proper divisors (3099751).

6528665 is a wasteful number, since it uses less digits than its factorization.

6528665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449.

The product of its digits is 86400, while the sum is 38.

The square root of 6528665 is about 2555.1252415488. The cubic root of 6528665 is about 186.8994951169.

It can be divided in two parts, 65 and 28665, that multiplied together give a square (1863225 = 1365²).

The spelling of 6528665 in words is "six million, five hundred twenty-eight thousand, six hundred sixty-five".