66308866 has 16 divisors (see below), whose sum is σ = 108408384. Its totient is φ = 30234384.

The previous prime is 66308843. The next prime is 66308867. The reversal of 66308866 is 66880366.

It is not an unprimeable number, because it can be changed into a prime (66308867) 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, 13206 + ... + 17521.

It is an arithmetic number, because the mean of its divisors is an integer number (6775524).

Almost surely, 2^66308866 is an apocalyptic number.

66308866 is a deficient number, since it is larger than the sum of its proper divisors (42099518).

66308866 is a wasteful number, since it uses less digits than its factorization.

66308866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30825.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 66308866 is about 8143.0256047737. The cubic root of 66308866 is about 404.7534260927.

The spelling of 66308866 in words is "sixty-six million, three hundred eight thousand, eight hundred sixty-six".