51660505612 has 24 divisors (see below), whose sum is σ = 92952724032. Its totient is φ = 25107235200.

The previous prime is 51660505609. The next prime is 51660505649. The reversal of 51660505612 is 21650506615.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536743 + ... + 625630.

It is an arithmetic number, because the mean of its divisors is an integer number (3873030168).

Almost surely, 2^51660505612 is an apocalyptic number.

It is an amenable number.

51660505612 is a deficient number, since it is larger than the sum of its proper divisors (41292218420).

51660505612 is a wasteful number, since it uses less digits than its factorization.

51660505612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162689 (or 1162687 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 51660505612 in words is "fifty-one billion, six hundred sixty million, five hundred five thousand, six hundred twelve".