66532289 has 2 divisors, whose sum is σ = 66532290. Its totient is φ = 66532288.

The previous prime is 66532247. The next prime is 66532337. The reversal of 66532289 is 98223566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53173264 + 13359025 = 7292^2 + 3655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66532289 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66532189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33266144 + 33266145.

It is an arithmetic number, because the mean of its divisors is an integer number (33266145).

Almost surely, 2^66532289 is an apocalyptic number.

It is an amenable number.

66532289 is a deficient number, since it is larger than the sum of its proper divisors (1).

66532289 is an equidigital number, since it uses as much as digits as its factorization.

66532289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 66532289 is about 8156.7327405034. The cubic root of 66532289 is about 405.2075124147.

The spelling of 66532289 in words is "sixty-six million, five hundred thirty-two thousand, two hundred eighty-nine".