51666883 has 4 divisors (see below), whose sum is σ = 51744328. Its totient is φ = 51589440.

The previous prime is 51666851. The next prime is 51666887. The reversal of 51666883 is 38866615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38866615 = 5 ⋅7773323.

It is a cyclic number.

It is not a de Polignac number, because 51666883 - 2⁵ = 51666851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51666887) 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, 37713 + ... + 39058.

It is an arithmetic number, because the mean of its divisors is an integer number (12936082).

Almost surely, 2^51666883 is an apocalyptic number.

51666883 is a deficient number, since it is larger than the sum of its proper divisors (77445).

51666883 is an equidigital number, since it uses as much as digits as its factorization.

51666883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77444.

The product of its digits is 207360, while the sum is 43.

The square root of 51666883 is about 7187.9679325940. The cubic root of 51666883 is about 372.4523801415.

The spelling of 51666883 in words is "fifty-one million, six hundred sixty-six thousand, eight hundred eighty-three".