51666755 has 8 divisors (see below), whose sum is σ = 70857312. Its totient is φ = 35428608.

The previous prime is 51666737. The next prime is 51666767. The reversal of 51666755 is 55766615.

51666755 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.

It is a cyclic number.

It is not a de Polignac number, because 51666755 - 2⁸ = 51666499 is a prime.

It is a Duffinian 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, 738062 + ... + 738131.

It is an arithmetic number, because the mean of its divisors is an integer number (8857164).

Almost surely, 2^51666755 is an apocalyptic number.

51666755 is a deficient number, since it is larger than the sum of its proper divisors (19190557).

51666755 is a wasteful number, since it uses less digits than its factorization.

51666755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476205.

The product of its digits is 189000, while the sum is 41.

The square root of 51666755 is about 7187.9590288204. The cubic root of 51666755 is about 372.4520725689.

The spelling of 51666755 in words is "fifty-one million, six hundred sixty-six thousand, seven hundred fifty-five".