66129066 has 12 divisors (see below), whose sum is σ = 143279682. Its totient is φ = 22043016.

The previous prime is 66129013. The next prime is 66129073. The reversal of 66129066 is 66092166.

It is a happy number.

66129066 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 only one way, i.e., 62964225 + 3164841 = 7935^2 + 1779^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66129066.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1836901 + ... + 1836936.

Almost surely, 2^66129066 is an apocalyptic number.

66129066 is an abundant number, since it is smaller than the sum of its proper divisors (77150616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66129066 is a wasteful number, since it uses less digits than its factorization.

66129066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3673845 (or 3673842 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 66129066 is about 8131.9779881650. The cubic root of 66129066 is about 404.3872581521.

The spelling of 66129066 in words is "sixty-six million, one hundred twenty-nine thousand, sixty-six".