66700429 has 2 divisors, whose sum is σ = 66700430. Its totient is φ = 66700428.

The previous prime is 66700423. The next prime is 66700441. The reversal of 66700429 is 92400766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57078025 + 9622404 = 7555^2 + 3102^2 .

It is a cyclic number.

It is not a de Polignac number, because 66700429 - 2³ = 66700421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66700394 and 66700403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66700421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33350214 + 33350215.

It is an arithmetic number, because the mean of its divisors is an integer number (33350215).

Almost surely, 2^66700429 is an apocalyptic number.

It is an amenable number.

66700429 is a deficient number, since it is larger than the sum of its proper divisors (1).

66700429 is an equidigital number, since it uses as much as digits as its factorization.

66700429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 66700429 is about 8167.0330598082. The cubic root of 66700429 is about 405.5485712634.

The spelling of 66700429 in words is "sixty-six million, seven hundred thousand, four hundred twenty-nine".