6561608 has 8 divisors (see below), whose sum is σ = 12303030. Its totient is φ = 3280800.

The previous prime is 6561589. The next prime is 6561613. The reversal of 6561608 is 8061656.

It can be written as a sum of positive squares in only one way, i.e., 4008004 + 2553604 = 2002^2 + 1598^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410093 + ... + 410108.

Almost surely, 2^6561608 is an apocalyptic number.

It is an amenable number.

6561608 is a deficient number, since it is larger than the sum of its proper divisors (5741422).

6561608 is a wasteful number, since it uses less digits than its factorization.

6561608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820207 (or 820203 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 6561608 is about 2561.5635850004. The cubic root of 6561608 is about 187.2133266622.

The spelling of 6561608 in words is "six million, five hundred sixty-one thousand, six hundred eight".