51660820552793 has 2 divisors, whose sum is σ = 51660820552794. Its totient is φ = 51660820552792.

The previous prime is 51660820552711. The next prime is 51660820552837. The reversal of 51660820552793 is 39725502806615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50101311619984 + 1559508932809 = 7078228^2 + 1248803^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51660820552793 is a prime.

It is a super-2 number, since 2×51660820552793² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51660820554793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25830410276396 + 25830410276397.

It is an arithmetic number, because the mean of its divisors is an integer number (25830410276397).

Almost surely, 2^{51660820552793} is an apocalyptic number.

It is an amenable number.

51660820552793 is a deficient number, since it is larger than the sum of its proper divisors (1).

51660820552793 is an equidigital number, since it uses as much as digits as its factorization.

51660820552793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216000, while the sum is 59.

The spelling of 51660820552793 in words is "fifty-one trillion, six hundred sixty billion, eight hundred twenty million, five hundred fifty-two thousand, seven hundred ninety-three".