51666002226451 has 2 divisors, whose sum is σ = 51666002226452. Its totient is φ = 51666002226450.

The previous prime is 51666002226439. The next prime is 51666002226523. The reversal of 51666002226451 is 15462220066615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51666002226451 - 2¹⁹ = 51666001702163 is a prime.

It is not a weakly prime, because it can be changed into another prime (51666002226431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25833001113225 + 25833001113226.

It is an arithmetic number, because the mean of its divisors is an integer number (25833001113226).

Almost surely, 2^{51666002226451} is an apocalyptic number.

51666002226451 is a deficient number, since it is larger than the sum of its proper divisors (1).

51666002226451 is an equidigital number, since it uses as much as digits as its factorization.

51666002226451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 51666002226451 in words is "fifty-one trillion, six hundred sixty-six billion, two million, two hundred twenty-six thousand, four hundred fifty-one".