6640260 has 48 divisors (see below), whose sum is σ = 20284992. Its totient is φ = 1609600.

The previous prime is 6640241. The next prime is 6640289. The reversal of 6640260 is 620466.

It is a self number, because there is not a number n which added to its sum of digits gives 6640260.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4371 + ... + 5690.

It is an arithmetic number, because the mean of its divisors is an integer number (422604).

Almost surely, 2^6640260 is an apocalyptic number.

6640260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6640260 is an abundant number, since it is smaller than the sum of its proper divisors (13644732).

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

6640260 is a wasteful number, since it uses less digits than its factorization.

6640260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10084 (or 10082 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 6640260 is about 2576.8701946353. The cubic root of 6640260 is about 187.9583807071.

The spelling of 6640260 in words is "six million, six hundred forty thousand, two hundred sixty".