60665810581 has 32 divisors (see below), whose sum is σ = 68181989760. Its totient is φ = 53640216576.

The previous prime is 60665810563. The next prime is 60665810593. The reversal of 60665810581 is 18501856606.

It is a cyclic number.

It is not a de Polignac number, because 60665810581 - 2¹³ = 60665802389 is a prime.

It is a super-2 number, since 2×60665810581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60665810531) 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 31 ways as a sum of consecutive naturals, for example, 30377475 + ... + 30379471.

It is an arithmetic number, because the mean of its divisors is an integer number (2130687180).

Almost surely, 2^60665810581 is an apocalyptic number.

It is an amenable number.

60665810581 is a deficient number, since it is larger than the sum of its proper divisors (7516179179).

60665810581 is a wasteful number, since it uses less digits than its factorization.

60665810581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773.

The product of its (nonzero) digits is 345600, while the sum is 46.

The spelling of 60665810581 in words is "sixty billion, six hundred sixty-five million, eight hundred ten thousand, five hundred eighty-one".