65565550 has 12 divisors (see below), whose sum is σ = 121952016. Its totient is φ = 26226200.

The previous prime is 65565541. The next prime is 65565553. The reversal of 65565550 is 5556556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65565553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 655606 + ... + 655705.

It is an arithmetic number, because the mean of its divisors is an integer number (10162668).

Almost surely, 2^65565550 is an apocalyptic number.

65565550 is a deficient number, since it is larger than the sum of its proper divisors (56386466).

65565550 is a wasteful number, since it uses less digits than its factorization.

65565550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311323 (or 1311318 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 37.

The square root of 65565550 is about 8097.2557079544. The cubic root of 65565550 is about 403.2353236498.

The spelling of 65565550 in words is "sixty-five million, five hundred sixty-five thousand, five hundred fifty".