6404668 has 12 divisors (see below), whose sum is σ = 11245752. Its totient is φ = 3191600.

The previous prime is 6404659. The next prime is 6404669. The reversal of 6404668 is 8664046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404669) 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, 1258 + ... + 3793.

It is an arithmetic number, because the mean of its divisors is an integer number (937146).

Almost surely, 2^6404668 is an apocalyptic number.

It is an amenable number.

6404668 is a deficient number, since it is larger than the sum of its proper divisors (4841084).

6404668 is a wasteful number, since it uses less digits than its factorization.

6404668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5372 (or 5370 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 6404668 is about 2530.7445544740. The cubic root of 6404668 is about 185.7086818258.

The spelling of 6404668 in words is "six million, four hundred four thousand, six hundred sixty-eight".