66066711 has 4 divisors (see below), whose sum is σ = 88088952. Its totient is φ = 44044472.

The previous prime is 66066683. The next prime is 66066731. The reversal of 66066711 is 11766066.

66066711 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66066711 - 2⁶ = 66066647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66066731) 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 3 ways as a sum of consecutive naturals, for example, 11011116 + ... + 11011121.

It is an arithmetic number, because the mean of its divisors is an integer number (22022238).

Almost surely, 2^66066711 is an apocalyptic number.

66066711 is a deficient number, since it is larger than the sum of its proper divisors (22022241).

66066711 is a wasteful number, since it uses less digits than its factorization.

66066711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22022240.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 66066711 is about 8128.1431458852. The cubic root of 66066711 is about 404.2601153859.

The spelling of 66066711 in words is "sixty-six million, sixty-six thousand, seven hundred eleven".