51666873 has 8 divisors (see below), whose sum is σ = 68923200. Its totient is φ = 34427568.

The previous prime is 51666851. The next prime is 51666887. The reversal of 51666873 is 37866615.

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

It is not a de Polignac number, because 51666873 - 2⁸ = 51666617 is a prime.

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 not an unprimeable number, because it can be changed into a prime (51666473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7363 + ... + 12551.

It is an arithmetic number, because the mean of its divisors is an integer number (8615400).

Almost surely, 2^51666873 is an apocalyptic number.

It is an amenable number.

51666873 is a deficient number, since it is larger than the sum of its proper divisors (17256327).

51666873 is a wasteful number, since it uses less digits than its factorization.

51666873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8511.

The product of its digits is 181440, while the sum is 42.

The square root of 51666873 is about 7187.9672369871. The cubic root of 51666873 is about 372.4523561124.

The spelling of 51666873 in words is "fifty-one million, six hundred sixty-six thousand, eight hundred seventy-three".