66446452 has 6 divisors (see below), whose sum is σ = 116281298. Its totient is φ = 33223224.

The previous prime is 66446447. The next prime is 66446473. The reversal of 66446452 is 25464466.

It can be written as a sum of positive squares in only one way, i.e., 37994896 + 28451556 = 6164^2 + 5334^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8305803 + ... + 8305810.

Almost surely, 2^66446452 is an apocalyptic number.

It is an amenable number.

66446452 is a deficient number, since it is larger than the sum of its proper divisors (49834846).

66446452 is a wasteful number, since it uses less digits than its factorization.

66446452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16611617 (or 16611615 counting only the distinct ones).

The product of its digits is 138240, while the sum is 37.

The square root of 66446452 is about 8151.4693154057. The cubic root of 66446452 is about 405.0331771835.

The spelling of 66446452 in words is "sixty-six million, four hundred forty-six thousand, four hundred fifty-two".