6660816 has 40 divisors (see below), whose sum is σ = 17320320. Its totient is φ = 2205696.

The previous prime is 6660809. The next prime is 6660859. The reversal of 6660816 is 6180666.

It is a congruent 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, 8905 + ... + 9623.

It is an arithmetic number, because the mean of its divisors is an integer number (433008).

Almost surely, 2^6660816 is an apocalyptic number.

It is an amenable number.

6660816 is an abundant number, since it is smaller than the sum of its proper divisors (10659504).

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

6660816 is a wasteful number, since it uses less digits than its factorization.

6660816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 6660816 is about 2580.8556720592. The cubic root of 6660816 is about 188.1521327811.

The spelling of 6660816 in words is "six million, six hundred sixty thousand, eight hundred sixteen".