6448665 has 8 divisors (see below), whose sum is σ = 10317888. Its totient is φ = 3439280.

The previous prime is 6448639. The next prime is 6448681. The reversal of 6448665 is 5668446.

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

It is not a de Polignac number, because 6448665 - 2⁵ = 6448633 is a prime.

It is a Curzon number.

6448665 is a lucky 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, 214941 + ... + 214970.

It is an arithmetic number, because the mean of its divisors is an integer number (1289736).

Almost surely, 2^6448665 is an apocalyptic number.

It is an amenable number.

6448665 is a deficient number, since it is larger than the sum of its proper divisors (3869223).

6448665 is a wasteful number, since it uses less digits than its factorization.

6448665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429919.

The product of its digits is 138240, while the sum is 39.

The square root of 6448665 is about 2539.4221783705. The cubic root of 6448665 is about 186.1329550031.

The spelling of 6448665 in words is "six million, four hundred forty-eight thousand, six hundred sixty-five".