6446660 has 24 divisors (see below), whose sum is σ = 14769216. Its totient is φ = 2344160.

The previous prime is 6446659. The next prime is 6446669. The reversal of 6446660 is 666446.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6446669) 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, 14432 + ... + 14871.

It is an arithmetic number, because the mean of its divisors is an integer number (615384).

Almost surely, 2^6446660 is an apocalyptic number.

It is an amenable number.

6446660 is an abundant number, since it is smaller than the sum of its proper divisors (8322556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6446660 is a wasteful number, since it uses less digits than its factorization.

6446660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29323 (or 29321 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 6446660 is about 2539.0273728339. The cubic root of 6446660 is about 186.1136623661.

The spelling of 6446660 in words is "six million, four hundred forty-six thousand, six hundred sixty".