66645116 has 12 divisors (see below), whose sum is σ = 116763360. Its totient is φ = 33284160.

The previous prime is 66645097. The next prime is 66645121. The reversal of 66645116 is 61154666.

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, 5501 + ... + 12788.

It is an arithmetic number, because the mean of its divisors is an integer number (9730280).

Almost surely, 2^66645116 is an apocalyptic number.

It is an amenable number.

66645116 is a deficient number, since it is larger than the sum of its proper divisors (50118244).

66645116 is a wasteful number, since it uses less digits than its factorization.

66645116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19204 (or 19202 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 66645116 is about 8163.6459991844. The cubic root of 66645116 is about 405.4364364935.

The spelling of 66645116 in words is "sixty-six million, six hundred forty-five thousand, one hundred sixteen".