65649903 has 16 divisors (see below), whose sum is σ = 101108736. Its totient is φ = 37447040.

The previous prime is 65649893. The next prime is 65649919. The reversal of 65649903 is 30994656.

It is a cyclic number.

It is not a de Polignac number, because 65649903 - 2²⁵ = 32095471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65649943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57951 + ... + 59072.

It is an arithmetic number, because the mean of its divisors is an integer number (6319296).

Almost surely, 2^65649903 is an apocalyptic number.

65649903 is a deficient number, since it is larger than the sum of its proper divisors (35458833).

65649903 is a wasteful number, since it uses less digits than its factorization.

65649903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117054.

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 65649903 is about 8102.4627737497. The cubic root of 65649903 is about 403.4081762773.

The spelling of 65649903 in words is "sixty-five million, six hundred forty-nine thousand, nine hundred three".