65680706543 has 4 divisors (see below), whose sum is σ = 65875605120. Its totient is φ = 65485807968.

The previous prime is 65680706537. The next prime is 65680706593. The reversal of 65680706543 is 34560708656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65680706543 - 2¹⁸ = 65680444399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65680706491 and 65680706500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65680706503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97448783 + ... + 97449456.

It is an arithmetic number, because the mean of its divisors is an integer number (16468901280).

Almost surely, 2^65680706543 is an apocalyptic number.

65680706543 is a deficient number, since it is larger than the sum of its proper divisors (194898577).

65680706543 is a wasteful number, since it uses less digits than its factorization.

65680706543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194898576.

The product of its (nonzero) digits is 3628800, while the sum is 50.

The spelling of 65680706543 in words is "sixty-five billion, six hundred eighty million, seven hundred six thousand, five hundred forty-three".