66445076 has 12 divisors (see below), whose sum is σ = 116779572. Its totient is φ = 33079488.

The previous prime is 66445013. The next prime is 66445117. The reversal of 66445076 is 67054466.

It can be written as a sum of positive squares in 2 ways, for example, as 47748100 + 18696976 = 6910^2 + 4324^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34715 + ... + 36578.

It is an arithmetic number, because the mean of its divisors is an integer number (9731631).

Almost surely, 2^66445076 is an apocalyptic number.

It is an amenable number.

66445076 is a deficient number, since it is larger than the sum of its proper divisors (50334496).

66445076 is a wasteful number, since it uses less digits than its factorization.

66445076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71530 (or 71528 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 66445076 is about 8151.3849130071. The cubic root of 66445076 is about 405.0303813006.

The spelling of 66445076 in words is "sixty-six million, four hundred forty-five thousand, seventy-six".