65765553 has 16 divisors (see below), whose sum is σ = 101007360. Its totient is φ = 37282896.

The previous prime is 65765543. The next prime is 65765561. The reversal of 65765553 is 35556756.

It is a happy number.

65765553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65765553 - 2¹⁶ = 65700017 is a prime.

It is a super-2 number, since 2×65765553² = 8650215922791618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65765543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9663 + ... + 14996.

It is an arithmetic number, because the mean of its divisors is an integer number (6312960).

Almost surely, 2^65765553 is an apocalyptic number.

It is an amenable number.

65765553 is a deficient number, since it is larger than the sum of its proper divisors (35241807).

65765553 is a wasteful number, since it uses less digits than its factorization.

65765553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24796.

The product of its digits is 472500, while the sum is 42.

The square root of 65765553 is about 8109.5963524703. The cubic root of 65765553 is about 403.6449209114.

The spelling of 65765553 in words is "sixty-five million, seven hundred sixty-five thousand, five hundred fifty-three".