6648385 has 16 divisors (see below), whose sum is σ = 8582400. Its totient is φ = 4928256.

The previous prime is 6648371. The next prime is 6648401. The reversal of 6648385 is 5838466.

It is a cyclic number.

It is not a de Polignac number, because 6648385 - 2²¹ = 4551233 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3721 + ... + 5209.

It is an arithmetic number, because the mean of its divisors is an integer number (536400).

Almost surely, 2^6648385 is an apocalyptic number.

6648385 is the 1489-th octagonal number.

It is an amenable number.

6648385 is a deficient number, since it is larger than the sum of its proper divisors (1934015).

6648385 is a wasteful number, since it uses less digits than its factorization.

6648385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560.

The product of its digits is 138240, while the sum is 40.

The square root of 6648385 is about 2578.4462375625. The cubic root of 6648385 is about 188.0350112100.

The spelling of 6648385 in words is "six million, six hundred forty-eight thousand, three hundred eighty-five".