51660705863 has 8 divisors (see below), whose sum is σ = 55914180000. Its totient is φ = 47447170848.

The previous prime is 51660705857. The next prime is 51660705871. The reversal of 51660705863 is 36850706615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51660705863 - 2¹⁰ = 51660704839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51660705883) 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 7 ways as a sum of consecutive naturals, for example, 9982088 + ... + 9987261.

It is an arithmetic number, because the mean of its divisors is an integer number (6989272500).

Almost surely, 2^51660705863 is an apocalyptic number.

51660705863 is a deficient number, since it is larger than the sum of its proper divisors (4253474137).

51660705863 is a wasteful number, since it uses less digits than its factorization.

51660705863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19969561.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 51660705863 in words is "fifty-one billion, six hundred sixty million, seven hundred five thousand, eight hundred sixty-three".