66383660 has 24 divisors (see below), whose sum is σ = 159321120. Its totient is φ = 22760064.

The previous prime is 66383641. The next prime is 66383671. The reversal of 66383660 is 6638366.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 236945 + ... + 237224.

It is an arithmetic number, because the mean of its divisors is an integer number (6638380).

Almost surely, 2^66383660 is an apocalyptic number.

It is an amenable number.

66383660 is an abundant number, since it is smaller than the sum of its proper divisors (92937460).

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

66383660 is a wasteful number, since it uses less digits than its factorization.

66383660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474185 (or 474183 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 66383660 is about 8147.6168294784. The cubic root of 66383660 is about 404.9055513130.

The spelling of 66383660 in words is "sixty-six million, three hundred eighty-three thousand, six hundred sixty".