66424129 has 2 divisors, whose sum is σ = 66424130. Its totient is φ = 66424128.

The previous prime is 66424109. The next prime is 66424177. The reversal of 66424129 is 92142466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66389904 + 34225 = 8148^2 + 185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66424129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66424094 and 66424103.

It is not a weakly prime, because it can be changed into another prime (66424109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33212064 + 33212065.

It is an arithmetic number, because the mean of its divisors is an integer number (33212065).

Almost surely, 2^66424129 is an apocalyptic number.

It is an amenable number.

66424129 is a deficient number, since it is larger than the sum of its proper divisors (1).

66424129 is an equidigital number, since it uses as much as digits as its factorization.

66424129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 34.

The square root of 66424129 is about 8150.0999380376. The cubic root of 66424129 is about 404.9878144990.

The spelling of 66424129 in words is "sixty-six million, four hundred twenty-four thousand, one hundred twenty-nine".