66736529 has 2 divisors, whose sum is σ = 66736530. Its totient is φ = 66736528.

The previous prime is 66736507. The next prime is 66736589. The reversal of 66736529 is 92563766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61984129 + 4752400 = 7873^2 + 2180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66736529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66736529.

It is not a weakly prime, because it can be changed into another prime (66736589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33368264 + 33368265.

It is an arithmetic number, because the mean of its divisors is an integer number (33368265).

Almost surely, 2^66736529 is an apocalyptic number.

It is an amenable number.

66736529 is a deficient number, since it is larger than the sum of its proper divisors (1).

66736529 is an equidigital number, since it uses as much as digits as its factorization.

66736529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 44.

The square root of 66736529 is about 8169.2428657740. The cubic root of 66736529 is about 405.6217225319.

The spelling of 66736529 in words is "sixty-six million, seven hundred thirty-six thousand, five hundred twenty-nine".