66151685333 has 2 divisors, whose sum is σ = 66151685334. Its totient is φ = 66151685332.

The previous prime is 66151685311. The next prime is 66151685351. The reversal of 66151685333 is 33358615166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36560116849 + 29591568484 = 191207^2 + 172022^2 .

It is a cyclic number.

It is not a de Polignac number, because 66151685333 - 2⁶ = 66151685269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66151685833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33075842666 + 33075842667.

It is an arithmetic number, because the mean of its divisors is an integer number (33075842667).

Almost surely, 2^66151685333 is an apocalyptic number.

It is an amenable number.

66151685333 is a deficient number, since it is larger than the sum of its proper divisors (1).

66151685333 is an equidigital number, since it uses as much as digits as its factorization.

66151685333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 47.

The spelling of 66151685333 in words is "sixty-six billion, one hundred fifty-one million, six hundred eighty-five thousand, three hundred thirty-three".