51791766 has 16 divisors (see below), whose sum is σ = 111551664. Its totient is φ = 15935904.

The previous prime is 51791723. The next prime is 51791771. The reversal of 51791766 is 66719715.

51791766 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331921 + ... + 332076.

It is an arithmetic number, because the mean of its divisors is an integer number (6971979).

Almost surely, 2^51791766 is an apocalyptic number.

51791766 is an abundant number, since it is smaller than the sum of its proper divisors (59759898).

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

51791766 is a wasteful number, since it uses less digits than its factorization.

51791766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664015.

The product of its digits is 79380, while the sum is 42.

The square root of 51791766 is about 7196.6496371576. The cubic root of 51791766 is about 372.7522211159.

The spelling of 51791766 in words is "fifty-one million, seven hundred ninety-one thousand, seven hundred sixty-six".