6648405 has 8 divisors (see below), whose sum is σ = 10637472. Its totient is φ = 3545808.

The previous prime is 6648401. The next prime is 6648407. The reversal of 6648405 is 5048466.

It is a happy number.

6648405 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6648405 - 2² = 6648401 is a prime.

6648405 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6648401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221599 + ... + 221628.

It is an arithmetic number, because the mean of its divisors is an integer number (1329684).

Almost surely, 2^6648405 is an apocalyptic number.

It is an amenable number.

6648405 is a deficient number, since it is larger than the sum of its proper divisors (3989067).

6648405 is a wasteful number, since it uses less digits than its factorization.

6648405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443235.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 6648405 is about 2578.4501158642. The cubic root of 6648405 is about 188.0351997618.

The spelling of 6648405 in words is "six million, six hundred forty-eight thousand, four hundred five".