66021301033 has 2 divisors, whose sum is σ = 66021301034. Its totient is φ = 66021301032.

The previous prime is 66021301001. The next prime is 66021301067. The reversal of 66021301033 is 33010312066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40869878569 + 25151422464 = 202163^2 + 158592^2 .

It is a cyclic number.

It is not a de Polignac number, because 66021301033 - 2⁵ = 66021301001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66021300989 and 66021301007.

It is not a weakly prime, because it can be changed into another prime (66021301733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33010650516 + 33010650517.

It is an arithmetic number, because the mean of its divisors is an integer number (33010650517).

Almost surely, 2^66021301033 is an apocalyptic number.

It is an amenable number.

66021301033 is a deficient number, since it is larger than the sum of its proper divisors (1).

66021301033 is an equidigital number, since it uses as much as digits as its factorization.

66021301033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 66021301033 its reverse (33010312066), we get a palindrome (99031613099).

The spelling of 66021301033 in words is "sixty-six billion, twenty-one million, three hundred one thousand, thirty-three".