66736829 has 2 divisors, whose sum is σ = 66736830. Its totient is φ = 66736828.

The previous prime is 66736811. The next prime is 66736907. The reversal of 66736829 is 92863766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33616804 + 33120025 = 5798^2 + 5755^2 .

It is a cyclic number.

It is not a de Polignac number, because 66736829 - 2¹² = 66732733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66736529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33368414 + 33368415.

It is an arithmetic number, because the mean of its divisors is an integer number (33368415).

Almost surely, 2^66736829 is an apocalyptic number.

It is an amenable number.

66736829 is a deficient number, since it is larger than the sum of its proper divisors (1).

66736829 is an equidigital number, since it uses as much as digits as its factorization.

66736829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 47.

The square root of 66736829 is about 8169.2612273081. The cubic root of 66736829 is about 405.6223303267.

The spelling of 66736829 in words is "sixty-six million, seven hundred thirty-six thousand, eight hundred twenty-nine".