65680706544 has 20 divisors (see below), whose sum is σ = 169675158696. Its totient is φ = 21893568832.

The previous prime is 65680706537. The next prime is 65680706593. The reversal of 65680706544 is 44560708656.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 684173979 + ... + 684174074.

Almost surely, 2^65680706544 is an apocalyptic number.

It is an amenable number.

65680706544 is an abundant number, since it is smaller than the sum of its proper divisors (103994452152).

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

65680706544 is a wasteful number, since it uses less digits than its factorization.

65680706544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368348064 (or 1368348058 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 51.

The spelling of 65680706544 in words is "sixty-five billion, six hundred eighty million, seven hundred six thousand, five hundred forty-four".