66020629 has 2 divisors, whose sum is σ = 66020630. Its totient is φ = 66020628.

The previous prime is 66020623. The next prime is 66020641. The reversal of 66020629 is 92602066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65642404 + 378225 = 8102^2 + 615^2 .

It is a cyclic number.

It is not a de Polignac number, because 66020629 - 2³ = 66020621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66020629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66020621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33010314 + 33010315.

It is an arithmetic number, because the mean of its divisors is an integer number (33010315).

Almost surely, 2^66020629 is an apocalyptic number.

It is an amenable number.

66020629 is a deficient number, since it is larger than the sum of its proper divisors (1).

66020629 is an equidigital number, since it uses as much as digits as its factorization.

66020629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 66020629 is about 8125.3079326263. The cubic root of 66020629 is about 404.1661020906.

The spelling of 66020629 in words is "sixty-six million, twenty thousand, six hundred twenty-nine".