66512329 has 16 divisors (see below), whose sum is σ = 74497024. Its totient is φ = 58968000.

The previous prime is 66512323. The next prime is 66512393. The reversal of 66512329 is 92321566.

It is not a de Polignac number, because 66512329 - 2¹⁵ = 66479561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66512294 and 66512303.

It is not an unprimeable number, because it can be changed into a prime (66512323) 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 in 15 ways as a sum of consecutive naturals, for example, 60307 + ... + 61399.

It is an arithmetic number, because the mean of its divisors is an integer number (4656064).

Almost surely, 2^66512329 is an apocalyptic number.

It is an amenable number.

66512329 is a deficient number, since it is larger than the sum of its proper divisors (7984695).

66512329 is a wasteful number, since it uses less digits than its factorization.

66512329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288.

The product of its digits is 19440, while the sum is 34.

The square root of 66512329 is about 8155.5091196074. The cubic root of 66512329 is about 405.1669869745.

It can be divided in two parts, 6651232 and 9, that added together give a square (6651241 = 2579²).

The spelling of 66512329 in words is "sixty-six million, five hundred twelve thousand, three hundred twenty-nine".