66103729 has 2 divisors, whose sum is σ = 66103730. Its totient is φ = 66103728.

The previous prime is 66103727. The next prime is 66103759. The reversal of 66103729 is 92730166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52056225 + 14047504 = 7215^2 + 3748^2 .

It is a cyclic number.

It is not a de Polignac number, because 66103729 - 2¹ = 66103727 is a prime.

Together with 66103727, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 66103694 and 66103703.

It is not a weakly prime, because it can be changed into another prime (66103721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33051864 + 33051865.

It is an arithmetic number, because the mean of its divisors is an integer number (33051865).

Almost surely, 2^66103729 is an apocalyptic number.

It is an amenable number.

66103729 is a deficient number, since it is larger than the sum of its proper divisors (1).

66103729 is an equidigital number, since it uses as much as digits as its factorization.

66103729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 66103729 is about 8130.4199768524. The cubic root of 66103729 is about 404.3356052788.

The spelling of 66103729 in words is "sixty-six million, one hundred three thousand, seven hundred twenty-nine".