51666011 has 2 divisors, whose sum is σ = 51666012. Its totient is φ = 51666010.

The previous prime is 51666001. The next prime is 51666029. The reversal of 51666011 is 11066615.

51666011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51666011 - 2²² = 47471707 is a prime.

It is not a weakly prime, because it can be changed into another prime (51666001) by changing a digit.

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 as a sum of consecutive naturals, namely, 25833005 + 25833006.

It is an arithmetic number, because the mean of its divisors is an integer number (25833006).

Almost surely, 2^51666011 is an apocalyptic number.

51666011 is a deficient number, since it is larger than the sum of its proper divisors (1).

51666011 is an equidigital number, since it uses as much as digits as its factorization.

51666011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 51666011 is about 7187.9072754175. The cubic root of 51666011 is about 372.4502847934.

The spelling of 51666011 in words is "fifty-one million, six hundred sixty-six thousand, eleven".