66916611 has 24 divisors (see below), whose sum is σ = 100638720. Its totient is φ = 44432712.

The previous prime is 66916559. The next prime is 66916621. The reversal of 66916611 is 11661966.

66916611 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66916611 - 2⁹ = 66916099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66916621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92710 + ... + 93428.

It is an arithmetic number, because the mean of its divisors is an integer number (4193280).

Almost surely, 2^66916611 is an apocalyptic number.

66916611 is a deficient number, since it is larger than the sum of its proper divisors (33722109).

66916611 is an equidigital number, since it uses as much as digits as its factorization.

66916611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117 (or 1105 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 66916611 is about 8180.2573920385. The cubic root of 66916611 is about 405.9862383810.

The spelling of 66916611 in words is "sixty-six million, nine hundred sixteen thousand, six hundred eleven".