6660416 has 28 divisors (see below), whose sum is σ = 15105888. Its totient is φ = 2854272.

The previous prime is 6660397. The next prime is 6660419. The reversal of 6660416 is 6140666.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×6660416² = 88722282586112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660419) 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, 6986 + ... + 7881.

It is an arithmetic number, because the mean of its divisors is an integer number (539496).

Almost surely, 2^6660416 is an apocalyptic number.

It is an amenable number.

6660416 is an abundant number, since it is smaller than the sum of its proper divisors (8445472).

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

6660416 is a wasteful number, since it uses less digits than its factorization.

6660416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14886 (or 14876 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 6660416 is about 2580.7781772171. The cubic root of 6660416 is about 188.1483663577.

The spelling of 6660416 in words is "six million, six hundred sixty thousand, four hundred sixteen".