65880105563 has 16 divisors (see below), whose sum is σ = 71112414240. Its totient is φ = 60827443200.

The previous prime is 65880105553. The next prime is 65880105569. The reversal of 65880105563 is 36550108856.

It is a cyclic number.

It is not a de Polignac number, because 65880105563 - 2²⁰ = 65879056987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65880105569) 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, 717803 + ... + 804363.

It is an arithmetic number, because the mean of its divisors is an integer number (4444525890).

Almost surely, 2^65880105563 is an apocalyptic number.

65880105563 is a deficient number, since it is larger than the sum of its proper divisors (5232308677).

65880105563 is a wasteful number, since it uses less digits than its factorization.

65880105563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87598.

The product of its (nonzero) digits is 864000, while the sum is 47.

The spelling of 65880105563 in words is "sixty-five billion, eight hundred eighty million, one hundred five thousand, five hundred sixty-three".