65665016501 has 32 divisors (see below), whose sum is σ = 78311439360. Its totient is φ = 53897550336.

The previous prime is 65665016471. The next prime is 65665016503. The reversal of 65665016501 is 10561056656.

It is not a de Polignac number, because 65665016501 - 2¹⁴ = 65665000117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65665016503) 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 31 ways as a sum of consecutive naturals, for example, 3113570 + ... + 3134588.

It is an arithmetic number, because the mean of its divisors is an integer number (2447232480).

Almost surely, 2^65665016501 is an apocalyptic number.

It is an amenable number.

65665016501 is a deficient number, since it is larger than the sum of its proper divisors (12646422859).

65665016501 is a wasteful number, since it uses less digits than its factorization.

65665016501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21273.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 65665016501 in words is "sixty-five billion, six hundred sixty-five million, sixteen thousand, five hundred one".