6657140 has 36 divisors (see below), whose sum is σ = 16264836. Its totient is φ = 2282112.

The previous prime is 6657109. The next prime is 6657179. The reversal of 6657140 is 417566.

It can be written as a sum of positive squares in 2 ways, for example, as 1449616 + 5207524 = 1204^2 + 2282^2 .

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

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, 2417 + ... + 4376.

It is an arithmetic number, because the mean of its divisors is an integer number (451801).

Almost surely, 2^6657140 is an apocalyptic number.

It is an amenable number.

6657140 is an abundant number, since it is smaller than the sum of its proper divisors (9607696).

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

6657140 is a wasteful number, since it uses less digits than its factorization.

6657140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6816 (or 6807 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 6657140 is about 2580.1434068671. The cubic root of 6657140 is about 188.1175136736.

The spelling of 6657140 in words is "six million, six hundred fifty-seven thousand, one hundred forty".