65771799450985 has 8 divisors (see below), whose sum is σ = 83080167727680. Its totient is φ = 49848100636464.

The previous prime is 65771799450971. The next prime is 65771799450989. The reversal of 65771799450985 is 58905499717756.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65771799450985 - 2²¹ = 65771797353833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65771799450899 and 65771799450908.

It is not an unprimeable number, because it can be changed into a prime (65771799450989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346167365437 + ... + 346167365626.

It is an arithmetic number, because the mean of its divisors is an integer number (10385020965960).

Almost surely, 2^{65771799450985} is an apocalyptic number.

It is an amenable number.

65771799450985 is a deficient number, since it is larger than the sum of its proper divisors (17308368276695).

65771799450985 is a wasteful number, since it uses less digits than its factorization.

65771799450985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692334731087.

The product of its (nonzero) digits is 6001128000, while the sum is 82.

The spelling of 65771799450985 in words is "sixty-five trillion, seven hundred seventy-one billion, seven hundred ninety-nine million, four hundred fifty thousand, nine hundred eighty-five".