60707721681 has 12 divisors (see below), whose sum is σ = 87700063360. Its totient is φ = 40466676600.

The previous prime is 60707721673. The next prime is 60707721709. The reversal of 60707721681 is 18612770706.

It is not a de Polignac number, because 60707721681 - 2³ = 60707721673 is a prime.

It is a super-2 number, since 2×60707721681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (60707721601) 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 11 ways as a sum of consecutive naturals, for example, 352621 + ... + 495738.

Almost surely, 2^60707721681 is an apocalyptic number.

It is an amenable number.

60707721681 is a deficient number, since it is larger than the sum of its proper divisors (26992341679).

60707721681 is a wasteful number, since it uses less digits than its factorization.

60707721681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856316 (or 856313 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The spelling of 60707721681 in words is "sixty billion, seven hundred seven million, seven hundred twenty-one thousand, six hundred eighty-one".