6654840 has 32 divisors (see below), whose sum is σ = 19964880. Its totient is φ = 1774592.

The previous prime is 6654829. The next prime is 6654847. The reversal of 6654840 is 484566.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6654847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27609 + ... + 27848.

Almost surely, 2^6654840 is an apocalyptic number.

6654840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6654840 is an abundant number, since it is smaller than the sum of its proper divisors (13310040).

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

6654840 is a wasteful number, since it uses less digits than its factorization.

6654840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55471 (or 55467 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 6654840 is about 2579.6976567032. The cubic root of 6654840 is about 188.0958467055.

The spelling of 6654840 in words is "six million, six hundred fifty-four thousand, eight hundred forty".