65655553 has 4 divisors (see below), whose sum is σ = 65723328. Its totient is φ = 65587780.

The previous prime is 65655503. The next prime is 65655559. The reversal of 65655553 is 35555656.

65655553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65655553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65655559) 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 3 ways as a sum of consecutive naturals, for example, 32413 + ... + 34378.

It is an arithmetic number, because the mean of its divisors is an integer number (16430832).

Almost surely, 2^65655553 is an apocalyptic number.

It is an amenable number.

65655553 is a deficient number, since it is larger than the sum of its proper divisors (67775).

65655553 is an equidigital number, since it uses as much as digits as its factorization.

65655553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67774.

The product of its digits is 337500, while the sum is 40.

The square root of 65655553 is about 8102.8114256720. The cubic root of 65655553 is about 403.4197487281.

The spelling of 65655553 in words is "sixty-five million, six hundred fifty-five thousand, five hundred fifty-three".