66703029121 has 2 divisors, whose sum is σ = 66703029122. Its totient is φ = 66703029120.

The previous prime is 66703029103. The next prime is 66703029167. The reversal of 66703029121 is 12192030766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58885816896 + 7817212225 = 242664^2 + 88415^2 .

It is a cyclic number.

It is not a de Polignac number, because 66703029121 - 2⁵ = 66703029089 is a prime.

It is not a weakly prime, because it can be changed into another prime (66703029221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33351514560 + 33351514561.

It is an arithmetic number, because the mean of its divisors is an integer number (33351514561).

Almost surely, 2^66703029121 is an apocalyptic number.

It is an amenable number.

66703029121 is a deficient number, since it is larger than the sum of its proper divisors (1).

66703029121 is an equidigital number, since it uses as much as digits as its factorization.

66703029121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

Adding to 66703029121 its reverse (12192030766), we get a palindrome (78895059887).

The spelling of 66703029121 in words is "sixty-six billion, seven hundred three million, twenty-nine thousand, one hundred twenty-one".