66287275633 has 2 divisors, whose sum is σ = 66287275634. Its totient is φ = 66287275632.

The previous prime is 66287275627. The next prime is 66287275697. The reversal of 66287275633 is 33657278266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65429547264 + 857728369 = 255792^2 + 29287^2 .

It is a cyclic number.

It is not a de Polignac number, because 66287275633 - 2²⁵ = 66253721201 is a prime.

It is not a weakly prime, because it can be changed into another prime (66287275133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33143637816 + 33143637817.

It is an arithmetic number, because the mean of its divisors is an integer number (33143637817).

Almost surely, 2^66287275633 is an apocalyptic number.

It is an amenable number.

66287275633 is a deficient number, since it is larger than the sum of its proper divisors (1).

66287275633 is an equidigital number, since it uses as much as digits as its factorization.

66287275633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15240960, while the sum is 55.

The spelling of 66287275633 in words is "sixty-six billion, two hundred eighty-seven million, two hundred seventy-five thousand, six hundred thirty-three".