6656580 has 120 divisors (see below), whose sum is σ = 23905728. Its totient is φ = 1518912.

The previous prime is 6656569. The next prime is 6656597. The reversal of 6656580 is 856566.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11047 + ... + 11633.

Almost surely, 2^6656580 is an apocalyptic number.

6656580 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6656580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11952864).

6656580 is an abundant number, since it is smaller than the sum of its proper divisors (17249148).

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

6656580 is a wasteful number, since it uses less digits than its factorization.

6656580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 604 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 6656580 is about 2580.0348834851. The cubic root of 6656580 is about 188.1122386976.

The spelling of 6656580 in words is "six million, six hundred fifty-six thousand, five hundred eighty".