6663240 has 96 divisors (see below), whose sum is σ = 22014720. Its totient is φ = 1747584.

The previous prime is 6663229. The next prime is 6663257. The reversal of 6663240 is 423666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29769 + ... + 29991.

It is an arithmetic number, because the mean of its divisors is an integer number (229320).

Almost surely, 2^6663240 is an apocalyptic number.

6663240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6663240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11007360).

6663240 is an abundant number, since it is smaller than the sum of its proper divisors (15351480).

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

6663240 is a wasteful number, since it uses less digits than its factorization.

6663240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 6663240 is about 2581.3252410341. The cubic root of 6663240 is about 188.1749540819.

It can be divided in two parts, 6663 and 240, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 6663240 in words is "six million, six hundred sixty-three thousand, two hundred forty".