66385066 has 16 divisors (see below), whose sum is σ = 108995040. Its totient is φ = 30073680.

The previous prime is 66385063. The next prime is 66385079. The reversal of 66385066 is 66058366.

It is not an unprimeable number, because it can be changed into a prime (66385063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1840 + ... + 11668.

It is an arithmetic number, because the mean of its divisors is an integer number (6812190).

Almost surely, 2^66385066 is an apocalyptic number.

66385066 is a deficient number, since it is larger than the sum of its proper divisors (42609974).

66385066 is a wasteful number, since it uses less digits than its factorization.

66385066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10149.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 66385066 is about 8147.7031119206. The cubic root of 66385066 is about 404.9084099140.

The spelling of 66385066 in words is "sixty-six million, three hundred eighty-five thousand, sixty-six".