6345665 has 8 divisors (see below), whose sum is σ = 7634088. Its totient is φ = 5063680.

The previous prime is 6345659. The next prime is 6345673. The reversal of 6345665 is 5665436.

It can be written as a sum of positive squares in 4 ways, for example, as 1399489 + 4946176 = 1183^2 + 2224^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6345665 - 2¹⁰ = 6344641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 929 + ... + 3681.

It is an arithmetic number, because the mean of its divisors is an integer number (954261).

Almost surely, 2^6345665 is an apocalyptic number.

It is an amenable number.

6345665 is a deficient number, since it is larger than the sum of its proper divisors (1288423).

6345665 is a wasteful number, since it uses less digits than its factorization.

6345665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3219.

The product of its digits is 64800, while the sum is 35.

The square root of 6345665 is about 2519.0603406826. The cubic root of 6345665 is about 185.1366411994.

The spelling of 6345665 in words is "six million, three hundred forty-five thousand, six hundred sixty-five".