65505011 has 16 divisors (see below), whose sum is σ = 77898240. Its totient is φ = 54297120.

The previous prime is 65505007. The next prime is 65505023. The reversal of 65505011 is 11050556.

It is a cyclic number.

It is not a de Polignac number, because 65505011 - 2² = 65505007 is a prime.

It is a super-2 number, since 2×65505011² = 8581812932220242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65505911) 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 15 ways as a sum of consecutive naturals, for example, 9110 + ... + 14628.

It is an arithmetic number, because the mean of its divisors is an integer number (4868640).

Almost surely, 2^65505011 is an apocalyptic number.

65505011 is a deficient number, since it is larger than the sum of its proper divisors (12393229).

65505011 is a wasteful number, since it uses less digits than its factorization.

65505011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5626.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 65505011 is about 8093.5166028124. The cubic root of 65505011 is about 403.1111782694. Note that the first 4 decimals are identical.

Adding to 65505011 its reverse (11050556), we get a palindrome (76555567).

The spelling of 65505011 in words is "sixty-five million, five hundred five thousand, eleven".