65987204736 has 128 divisors (see below), whose sum is σ = 177373022400. Its totient is φ = 21733982208.

The previous prime is 65987204711. The next prime is 65987204771. The reversal of 65987204736 is 63740278956.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×65987204736² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17789250 + ... + 17792958.

Almost surely, 2^65987204736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65987204736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88686511200).

65987204736 is an abundant number, since it is smaller than the sum of its proper divisors (111385817664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65987204736 is a wasteful number, since it uses less digits than its factorization.

65987204736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4266 (or 4254 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 57.

The spelling of 65987204736 in words is "sixty-five billion, nine hundred eighty-seven million, two hundred four thousand, seven hundred thirty-six".