6660672 has 56 divisors (see below), whose sum is σ = 17836896. Its totient is φ = 2193408.

The previous prime is 6660649. The next prime is 6660677. The reversal of 6660672 is 2760666.

It is not an unprimeable number, because it can be changed into a prime (6660677) 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, 21543 + ... + 21849.

It is an arithmetic number, because the mean of its divisors is an integer number (318516).

Almost surely, 2^6660672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6660672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8918448).

6660672 is an abundant number, since it is smaller than the sum of its proper divisors (11176224).

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

6660672 is a wasteful number, since it uses less digits than its factorization.

6660672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 6660672 is about 2580.8277741841. The cubic root of 6660672 is about 188.1507768861.

The spelling of 6660672 in words is "six million, six hundred sixty thousand, six hundred seventy-two".