66863329 has 27 divisors (see below), whose sum is σ = 79046667. Its totient is φ = 56519424.

The previous prime is 66863267. The next prime is 66863339. The reversal of 66863329 is 92336866.

The square root of 66863329 is 8177.

It is a perfect power (a square), and thus also a powerful number.

66863329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 13 ways, for example, as 11390625 + 55472704 = 3375^2 + 7448^2 .

It is not a de Polignac number, because 66863329 - 2⁷ = 66863201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66863339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1807099 + ... + 1807135.

Almost surely, 2^66863329 is an apocalyptic number.

66863329 is the 8177-th square number.

66863329 is the 4089-th centered octagonal number.

It is an amenable number.

66863329 is a deficient number, since it is larger than the sum of its proper divisors (12183338).

66863329 is a wasteful number, since it uses less digits than its factorization.

66863329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 67 counting only the distinct ones).

The product of its digits is 279936, while the sum is 43.

The cubic root of 66863329 is about 405.8784549654.

The spelling of 66863329 in words is "sixty-six million, eight hundred sixty-three thousand, three hundred twenty-nine".