51665458020366 has 8 divisors (see below), whose sum is σ = 103330916040744. Its totient is φ = 17221819340120.

The previous prime is 51665458020353. The next prime is 51665458020373. The reversal of 51665458020366 is 66302085456615.

It is a happy number.

51665458020366 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

51665458020366 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4305454835025 + ... + 4305454835036.

It is an arithmetic number, because the mean of its divisors is an integer number (12916364505093).

Almost surely, 2^{51665458020366} is an apocalyptic number.

51665458020366 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51665458020366 is a wasteful number, since it uses less digits than its factorization.

51665458020366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8610909670066.

The product of its (nonzero) digits is 31104000, while the sum is 57.

The spelling of 51665458020366 in words is "fifty-one trillion, six hundred sixty-five billion, four hundred fifty-eight million, twenty thousand, three hundred sixty-six".