65986647487 has 8 divisors (see below), whose sum is σ = 66276952992. Its totient is φ = 65696736000.

The previous prime is 65986647469. The next prime is 65986647499. The reversal of 65986647487 is 78474668956.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65986647487 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 (65986647437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239718 + ... + 435244.

It is an arithmetic number, because the mean of its divisors is an integer number (8284619124).

Almost surely, 2^65986647487 is an apocalyptic number.

65986647487 is a deficient number, since it is larger than the sum of its proper divisors (290305505).

65986647487 is a wasteful number, since it uses less digits than its factorization.

65986647487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197009.

The product of its digits is 487710720, while the sum is 70.

The spelling of 65986647487 in words is "sixty-five billion, nine hundred eighty-six million, six hundred forty-seven thousand, four hundred eighty-seven".