6678240 has 48 divisors (see below), whose sum is σ = 21037968. Its totient is φ = 1780736.

The previous prime is 6678233. The next prime is 6678247. The reversal of 6678240 is 428766.

6678240 = 291² + 292² + ... + 354².

It is an interprime number because it is at equal distance from previous prime (6678233) and next prime (6678247).

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6678247) 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, 6477 + ... + 7436.

It is an arithmetic number, because the mean of its divisors is an integer number (438291).

Almost surely, 2^6678240 is an apocalyptic number.

6678240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6678240 is an abundant number, since it is smaller than the sum of its proper divisors (14359728).

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

6678240 is a wasteful number, since it uses less digits than its factorization.

6678240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13931 (or 13923 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 6678240 is about 2584.2290920118. The cubic root of 6678240 is about 188.3160520512.

The spelling of 6678240 in words is "six million, six hundred seventy-eight thousand, two hundred forty".