65664072901 has 16 divisors (see below), whose sum is σ = 77472289024. Its totient is φ = 54478531584.

The previous prime is 65664072889. The next prime is 65664072911. The reversal of 65664072901 is 10927046656.

It is a cyclic number.

It is not a de Polignac number, because 65664072901 - 2⁹ = 65664072389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65664072911) 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, 606825 + ... + 706798.

It is an arithmetic number, because the mean of its divisors is an integer number (4842018064).

Almost surely, 2^65664072901 is an apocalyptic number.

It is an amenable number.

65664072901 is a deficient number, since it is larger than the sum of its proper divisors (11808216123).

65664072901 is a wasteful number, since it uses less digits than its factorization.

65664072901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313860.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 65664072901 in words is "sixty-five billion, six hundred sixty-four million, seventy-two thousand, nine hundred one".