6380665 has 4 divisors (see below), whose sum is σ = 7656804. Its totient is φ = 5104528.

The previous prime is 6380663. The next prime is 6380669. The reversal of 6380665 is 5660836.

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 1597696 + 4782969 = 1264^2 + 2187^2 .

It is a cyclic number.

It is not a de Polignac number, because 6380665 - 2¹ = 6380663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6380665.

It is not an unprimeable number, because it can be changed into a prime (6380663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638062 + ... + 638071.

It is an arithmetic number, because the mean of its divisors is an integer number (1914201).

Almost surely, 2^6380665 is an apocalyptic number.

It is an amenable number.

6380665 is a deficient number, since it is larger than the sum of its proper divisors (1276139).

6380665 is a wasteful number, since it uses less digits than its factorization.

6380665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276138.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 6380665 is about 2525.9978226436. The cubic root of 6380665 is about 185.4763957440.

The spelling of 6380665 in words is "six million, three hundred eighty thousand, six hundred sixty-five".