51655550666660 has 24 divisors (see below), whose sum is σ = 108574471285560. Its totient is φ = 20643588859904.

The previous prime is 51655550666647. The next prime is 51655550666689. The reversal of 51655550666660 is 6666605555615.

It can be written as a sum of positive squares in 4 ways, for example, as 6692548864 + 51648858117796 = 81808^2 + 7186714^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51655550666593 and 51655550666602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1164440189 + ... + 1164484548.

It is an arithmetic number, because the mean of its divisors is an integer number (4523936303565).

Almost surely, 2^{51655550666660} is an apocalyptic number.

It is an amenable number.

51655550666660 is an abundant number, since it is smaller than the sum of its proper divisors (56918920618900).

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

51655550666660 is a wasteful number, since it uses less digits than its factorization.

51655550666660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328925855 (or 2328925853 counting only the distinct ones).

The product of its (nonzero) digits is 145800000, while the sum is 62.

The spelling of 51655550666660 in words is "fifty-one trillion, six hundred fifty-five billion, five hundred fifty million, six hundred sixty-six thousand, six hundred sixty".