51660820552775 has 24 divisors (see below), whose sum is σ = 73279248384480. Its totient is φ = 35391424498560.

The previous prime is 51660820552711. The next prime is 51660820552793. The reversal of 51660820552775 is 57725502806615.

It is not a de Polignac number, because 51660820552775 - 2⁶ = 51660820552711 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137888084 + ... + 138262233.

It is an arithmetic number, because the mean of its divisors is an integer number (3053302016020).

Almost surely, 2^{51660820552775} is an apocalyptic number.

51660820552775 is a deficient number, since it is larger than the sum of its proper divisors (21618427831705).

51660820552775 is a wasteful number, since it uses less digits than its factorization.

51660820552775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276151403 (or 276151398 counting only the distinct ones).

The product of its (nonzero) digits is 35280000, while the sum is 59.

The spelling of 51660820552775 in words is "fifty-one trillion, six hundred sixty billion, eight hundred twenty million, five hundred fifty-two thousand, seven hundred seventy-five".