65520055 has 12 divisors (see below), whose sum is σ = 79748280. Its totient is φ = 51676992.

The previous prime is 65520053. The next prime is 65520071. The reversal of 65520055 is 55002556.

It is not a de Polignac number, because 65520055 - 2¹ = 65520053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65520053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25416 + ... + 27874.

It is an arithmetic number, because the mean of its divisors is an integer number (6645690).

Almost surely, 2^65520055 is an apocalyptic number.

65520055 is a deficient number, since it is larger than the sum of its proper divisors (14228225).

65520055 is an equidigital number, since it uses as much as digits as its factorization.

65520055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2610 (or 2537 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 65520055 is about 8094.4459353312. The cubic root of 65520055 is about 403.1420356561.

The spelling of 65520055 in words is "sixty-five million, five hundred twenty thousand, fifty-five".