51665066611050 has 192 divisors, whose sum is σ = 133305307200000. Its totient is φ = 13230613094400.

The previous prime is 51665066611009. The next prime is 51665066611079. The reversal of 51665066611050 is 5011666056615.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1333307076 + ... + 1333345824.

It is an arithmetic number, because the mean of its divisors is an integer number (694298475000).

Almost surely, 2^{51665066611050} is an apocalyptic number.

51665066611050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51665066611050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66652653600000).

51665066611050 is an abundant number, since it is smaller than the sum of its proper divisors (81640240588950).

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

51665066611050 is a wasteful number, since it uses less digits than its factorization.

51665066611050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41921 (or 41916 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 51665066611050 in words is "fifty-one trillion, six hundred sixty-five billion, sixty-six million, six hundred eleven thousand, fifty".