6561380 has 24 divisors (see below), whose sum is σ = 15747648. Its totient is φ = 2249568.

The previous prime is 6561319. The next prime is 6561383. The reversal of 6561380 is 831656.

It is not an unprimeable number, because it can be changed into a prime (6561383) 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, 23294 + ... + 23573.

It is an arithmetic number, because the mean of its divisors is an integer number (656152).

Almost surely, 2^6561380 is an apocalyptic number.

It is an amenable number.

6561380 is an abundant number, since it is smaller than the sum of its proper divisors (9186268).

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

6561380 is a wasteful number, since it uses less digits than its factorization.

6561380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46883 (or 46881 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 6561380 is about 2561.5190805458. The cubic root of 6561380 is about 187.2111582338.

The spelling of 6561380 in words is "six million, five hundred sixty-one thousand, three hundred eighty".