66020029 has 2 divisors, whose sum is σ = 66020030. Its totient is φ = 66020028.

The previous prime is 66020011. The next prime is 66020077. The reversal of 66020029 is 92002066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45562500 + 20457529 = 6750^2 + 4523^2 .

It is a cyclic number.

It is not a de Polignac number, because 66020029 - 2⁷ = 66019901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66019985 and 66020012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66020329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33010014 + 33010015.

It is an arithmetic number, because the mean of its divisors is an integer number (33010015).

Almost surely, 2^66020029 is an apocalyptic number.

It is an amenable number.

66020029 is a deficient number, since it is larger than the sum of its proper divisors (1).

66020029 is an equidigital number, since it uses as much as digits as its factorization.

66020029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 66020029 is about 8125.2710108648. The cubic root of 66020029 is about 404.1648777238.

The spelling of 66020029 in words is "sixty-six million, twenty thousand, twenty-nine".