65986647489 has 40 divisors (see below), whose sum is σ = 113748286080. Its totient is φ = 37340538624.

The previous prime is 65986647469. The next prime is 65986647499. The reversal of 65986647489 is 98474668956.

65986647489 is a `hidden beast` number, since 6 + 5 + 9 + 86 + 64 + 7 + 489 = 666.

It is not a de Polignac number, because 65986647489 - 2⁹ = 65986646977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65986647469) 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 39 ways as a sum of consecutive naturals, for example, 506544 + ... + 623345.

It is an arithmetic number, because the mean of its divisors is an integer number (2843707152).

Almost surely, 2^65986647489 is an apocalyptic number.

It is an amenable number.

65986647489 is a deficient number, since it is larger than the sum of its proper divisors (47761638591).

65986647489 is a wasteful number, since it uses less digits than its factorization.

65986647489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130011 (or 1130002 counting only the distinct ones).

The product of its digits is 627056640, while the sum is 72.

The spelling of 65986647489 in words is "sixty-five billion, nine hundred eighty-six million, six hundred forty-seven thousand, four hundred eighty-nine".