66774033743633 has 2 divisors, whose sum is σ = 66774033743634. Its totient is φ = 66774033743632.

The previous prime is 66774033743611. The next prime is 66774033743827. The reversal of 66774033743633 is 33634733047766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64034452635409 + 2739581108224 = 8002153^2 + 1655168^2 .

It is a cyclic number.

It is not a de Polignac number, because 66774033743633 - 2¹⁸ = 66774033481489 is a prime.

It is not a weakly prime, because it can be changed into another prime (66774033043633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33387016871816 + 33387016871817.

It is an arithmetic number, because the mean of its divisors is an integer number (33387016871817).

Almost surely, 2^{66774033743633} is an apocalyptic number.

It is an amenable number.

66774033743633 is a deficient number, since it is larger than the sum of its proper divisors (1).

66774033743633 is an equidigital number, since it uses as much as digits as its factorization.

66774033743633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288054144, while the sum is 62.

The spelling of 66774033743633 in words is "sixty-six trillion, seven hundred seventy-four billion, thirty-three million, seven hundred forty-three thousand, six hundred thirty-three".