66437368633 has 2 divisors, whose sum is σ = 66437368634. Its totient is φ = 66437368632.

The previous prime is 66437368601. The next prime is 66437368643. The reversal of 66437368633 is 33686373466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37252088064 + 29185280569 = 193008^2 + 170837^2 .

It is a cyclic number.

It is not a de Polignac number, because 66437368633 - 2⁵ = 66437368601 is a prime.

It is not a weakly prime, because it can be changed into another prime (66437368643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33218684316 + 33218684317.

It is an arithmetic number, because the mean of its divisors is an integer number (33218684317).

Almost surely, 2^66437368633 is an apocalyptic number.

It is an amenable number.

66437368633 is a deficient number, since it is larger than the sum of its proper divisors (1).

66437368633 is an equidigital number, since it uses as much as digits as its factorization.

66437368633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23514624, while the sum is 55.

The spelling of 66437368633 in words is "sixty-six billion, four hundred thirty-seven million, three hundred sixty-eight thousand, six hundred thirty-three".