66945124 has 9 divisors (see below), whose sum is σ = 117182611. Its totient is φ = 33464380.

The previous prime is 66945107. The next prime is 66945163. The reversal of 66945124 is 42154966.

The square root of 66945124 is 8182.

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

66945124 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Duffinian number.

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 2 ways as a sum of consecutive naturals, for example, 14319 + ... + 18409.

Almost surely, 2^66945124 is an apocalyptic number.

66945124 is the 8182-nd square number.

It is an amenable number.

66945124 is a deficient number, since it is larger than the sum of its proper divisors (50237487).

66945124 is an frugal number, since it uses more digits than its factorization.

66945124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8186 (or 4093 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The cubic root of 66945124 is about 406.0438934320.

The spelling of 66945124 in words is "sixty-six million, nine hundred forty-five thousand, one hundred twenty-four".