6661760 has 64 divisors (see below), whose sum is σ = 18213120. Its totient is φ = 2282496.

The previous prime is 6661757. The next prime is 6661771. The reversal of 6661760 is 671666.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 3737 + ... + 5223.

It is an arithmetic number, because the mean of its divisors is an integer number (284580).

Almost surely, 2^6661760 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 6661760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9106560).

6661760 is an abundant number, since it is smaller than the sum of its proper divisors (11551360).

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

6661760 is a wasteful number, since it uses less digits than its factorization.

6661760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513 (or 1501 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 6661760 is about 2581.0385506613. The cubic root of 6661760 is about 188.1610209425.

The spelling of 6661760 in words is "six million, six hundred sixty-one thousand, seven hundred sixty".