6655572 has 108 divisors (see below), whose sum is σ = 21411936. Its totient is φ = 1728720.

The previous prime is 6655549. The next prime is 6655577. The reversal of 6655572 is 2755566.

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

Its product of digits (63000) is a multiple of the sum of its prime factors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6655577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 605047 + ... + 605057.

Almost surely, 2^6655572 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 6655572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10705968).

6655572 is an abundant number, since it is smaller than the sum of its proper divisors (14756364).

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

6655572 is a wasteful number, since it uses less digits than its factorization.

6655572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56 (or 23 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 6655572 is about 2579.8395298933. The cubic root of 6655572 is about 188.1027429952.

It can be divided in two parts, 6655 and 572, that added together give a palindrome (7227).

The spelling of 6655572 in words is "six million, six hundred fifty-five thousand, five hundred seventy-two".