51066605560 has 16 divisors (see below), whose sum is σ = 114899862600. Its totient is φ = 20426642208.

The previous prime is 51066605549. The next prime is 51066605593. The reversal of 51066605560 is 6550666015.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1276665139 = 51066605560 / (5 + 1 + 0 + 6 + 6 + 6 + 0 + 5 + 5 + 6 + 0).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 638332530 + ... + 638332609.

Almost surely, 2^51066605560 is an apocalyptic number.

It is an amenable number.

51066605560 is an abundant number, since it is smaller than the sum of its proper divisors (63833257040).

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

51066605560 is a wasteful number, since it uses less digits than its factorization.

51066605560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276665150 (or 1276665146 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 51066605560 in words is "fifty-one billion, sixty-six million, six hundred five thousand, five hundred sixty".