6545609660 has 12 divisors (see below), whose sum is σ = 13745780328. Its totient is φ = 2618243856.

The previous prime is 6545609659. The next prime is 6545609711. The reversal of 6545609660 is 669065456.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163640222 + ... + 163640261.

It is an arithmetic number, because the mean of its divisors is an integer number (1145481694).

Almost surely, 2^6545609660 is an apocalyptic number.

It is an amenable number.

6545609660 is an abundant number, since it is smaller than the sum of its proper divisors (7200170668).

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

6545609660 is a wasteful number, since it uses less digits than its factorization.

6545609660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327280492 (or 327280490 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 47.

The square root of 6545609660 is about 80904.9421234575. The cubic root of 6545609660 is about 1870.6104996683.

The spelling of 6545609660 in words is "six billion, five hundred forty-five million, six hundred nine thousand, six hundred sixty".