66814276 has 27 divisors (see below), whose sum is σ = 120673917. Its totient is φ = 32369040.

The previous prime is 66814271. The next prime is 66814277. The reversal of 66814276 is 67241866.

The square root of 66814276 is 8174.

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

66814276 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., 2172676 + 64641600 = 1474^2 + 8040^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66814271) 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 8 ways as a sum of consecutive naturals, for example, 997195 + ... + 997261.

Almost surely, 2^66814276 is an apocalyptic number.

66814276 is the 8174-th square number.

It is an amenable number.

66814276 is a deficient number, since it is larger than the sum of its proper divisors (53859641).

66814276 is an equidigital number, since it uses as much as digits as its factorization.

66814276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 130 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The cubic root of 66814276 is about 405.7791756999.

The spelling of 66814276 in words is "sixty-six million, eight hundred fourteen thousand, two hundred seventy-six".