6561330 has 16 divisors (see below), whose sum is σ = 15747264. Its totient is φ = 1749680.

The previous prime is 6561319. The next prime is 6561383. The reversal of 6561330 is 331656.

It is a self number, because there is not a number n which added to its sum of digits gives 6561330.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109326 + ... + 109385.

It is an arithmetic number, because the mean of its divisors is an integer number (984204).

Almost surely, 2^6561330 is an apocalyptic number.

6561330 is an abundant number, since it is smaller than the sum of its proper divisors (9185934).

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

6561330 is a wasteful number, since it uses less digits than its factorization.

6561330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218721.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 6561330 is about 2561.5093206936. The cubic root of 6561330 is about 187.2106826945.

Adding to 6561330 its reverse (331656), we get a palindrome (6892986).

The spelling of 6561330 in words is "six million, five hundred sixty-one thousand, three hundred thirty".