66529493 has 2 divisors, whose sum is σ = 66529494. Its totient is φ = 66529492.

The previous prime is 66529453. The next prime is 66529537. The reversal of 66529493 is 39492566.

It is an a-pointer prime, because the next prime (66529537) can be obtained adding 66529493 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37185604 + 29343889 = 6098^2 + 5417^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66529493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66529433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33264746 + 33264747.

It is an arithmetic number, because the mean of its divisors is an integer number (33264747).

Almost surely, 2^66529493 is an apocalyptic number.

It is an amenable number.

66529493 is a deficient number, since it is larger than the sum of its proper divisors (1).

66529493 is an equidigital number, since it uses as much as digits as its factorization.

66529493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 44.

The square root of 66529493 is about 8156.5613465479. The cubic root of 66529493 is about 405.2018360928.

The spelling of 66529493 in words is "sixty-six million, five hundred twenty-nine thousand, four hundred ninety-three".