51666733333 has 2 divisors, whose sum is σ = 51666733334. Its totient is φ = 51666733332.

The previous prime is 51666733303. The next prime is 51666733373. The reversal of 51666733333 is 33333766615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51666653809 + 79524 = 227303^2 + 282^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51666733333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51666733303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25833366666 + 25833366667.

It is an arithmetic number, because the mean of its divisors is an integer number (25833366667).

Almost surely, 2^51666733333 is an apocalyptic number.

It is an amenable number.

51666733333 is a deficient number, since it is larger than the sum of its proper divisors (1).

51666733333 is an equidigital number, since it uses as much as digits as its factorization.

51666733333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1837080, while the sum is 46.

The spelling of 51666733333 in words is "fifty-one billion, six hundred sixty-six million, seven hundred thirty-three thousand, three hundred thirty-three".