6611440 has 60 divisors (see below), whose sum is σ = 16920792. Its totient is φ = 2400640.

The previous prime is 6611417. The next prime is 6611441. The reversal of 6611440 is 441166.

It is a super-2 number, since 2×6611440² = 87422277747200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6611441) 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 11 ways as a sum of consecutive naturals, for example, 9339 + ... + 10021.

Almost surely, 2^6611440 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 6611440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8460396).

6611440 is an abundant number, since it is smaller than the sum of its proper divisors (10309352).

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

6611440 is a wasteful number, since it uses less digits than its factorization.

6611440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 6611440 is about 2571.2720587289. The cubic root of 6611440 is about 187.6860612314.

The spelling of 6611440 in words is "six million, six hundred eleven thousand, four hundred forty".