6432665 has 4 divisors (see below), whose sum is σ = 7719204. Its totient is φ = 5146128.

The previous prime is 6432649. The next prime is 6432691. The reversal of 6432665 is 5662346.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2226064 + 4206601 = 1492^2 + 2051^2 .

It is a cyclic number.

It is not a de Polignac number, because 6432665 - 2⁴ = 6432649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 643262 + ... + 643271.

It is an arithmetic number, because the mean of its divisors is an integer number (1929801).

Almost surely, 2^6432665 is an apocalyptic number.

It is an amenable number.

6432665 is a deficient number, since it is larger than the sum of its proper divisors (1286539).

6432665 is a wasteful number, since it uses less digits than its factorization.

6432665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286538.

The product of its digits is 25920, while the sum is 32.

The square root of 6432665 is about 2536.2698988869. The cubic root of 6432665 is about 185.9788872633.

The spelling of 6432665 in words is "six million, four hundred thirty-two thousand, six hundred sixty-five".