51755766 has 8 divisors (see below), whose sum is σ = 103511544. Its totient is φ = 17251920.

The previous prime is 51755761. The next prime is 51755779. The reversal of 51755766 is 66755715.

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

51755766 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51755761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4312975 + ... + 4312986.

It is an arithmetic number, because the mean of its divisors is an integer number (12938943).

Almost surely, 2^51755766 is an apocalyptic number.

51755766 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.

51755766 is a wasteful number, since it uses less digits than its factorization.

51755766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8625966.

The product of its digits is 220500, while the sum is 42.

The square root of 51755766 is about 7194.1480385102. The cubic root of 51755766 is about 372.6658355032.

The spelling of 51755766 in words is "fifty-one million, seven hundred fifty-five thousand, seven hundred sixty-six".