66717038429 has 2 divisors, whose sum is σ = 66717038430. Its totient is φ = 66717038428.

The previous prime is 66717038417. The next prime is 66717038447. The reversal of 66717038429 is 92483071766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48091612804 + 18625425625 = 219298^2 + 136475^2 .

It is a cyclic number.

It is not a de Polignac number, because 66717038429 - 2³² = 62422071133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66717038459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33358519214 + 33358519215.

It is an arithmetic number, because the mean of its divisors is an integer number (33358519215).

Almost surely, 2^66717038429 is an apocalyptic number.

It is an amenable number.

66717038429 is a deficient number, since it is larger than the sum of its proper divisors (1).

66717038429 is an equidigital number, since it uses as much as digits as its factorization.

66717038429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 66717038429 in words is "sixty-six billion, seven hundred seventeen million, thirty-eight thousand, four hundred twenty-nine".