6651140 has 48 divisors (see below), whose sum is σ = 15361920. Its totient is φ = 2407680.

The previous prime is 6651133. The next prime is 6651149. The reversal of 6651140 is 411566.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (6651149) 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 15 ways as a sum of consecutive naturals, for example, 8360 + ... + 9120.

It is an arithmetic number, because the mean of its divisors is an integer number (320040).

Almost surely, 2^6651140 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 6651140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7680960).

6651140 is an abundant number, since it is smaller than the sum of its proper divisors (8710780).

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

6651140 is a wasteful number, since it uses less digits than its factorization.

6651140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 6651140 is about 2578.9804186926. The cubic root of 6651140 is about 188.0609806705.

6651140 divided by its sum of digits (23) gives a triangular number (289180 = T₇₆₀).

The spelling of 6651140 in words is "six million, six hundred fifty-one thousand, one hundred forty".