65680706536 has 16 divisors (see below), whose sum is σ = 123186393540. Its totient is φ = 32831001600.

The previous prime is 65680706519. The next prime is 65680706537. The reversal of 65680706536 is 63560708656.

It can be written as a sum of positive squares in 2 ways, for example, as 65356922500 + 323784036 = 255650^2 + 17994^2 .

It is a super-2 number, since 2×65680706536² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65680706537) by changing a digit.

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, 1139065 + ... + 1195336.

Almost surely, 2^65680706536 is an apocalyptic number.

It is an amenable number.

65680706536 is a deficient number, since it is larger than the sum of its proper divisors (57505687004).

65680706536 is a wasteful number, since it uses less digits than its factorization.

65680706536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337924 (or 2337920 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 52.

The spelling of 65680706536 in words is "sixty-five billion, six hundred eighty million, seven hundred six thousand, five hundred thirty-six".