66266066611 has 4 divisors (see below), whose sum is σ = 66332533072. Its totient is φ = 66199600152.

The previous prime is 66266066609. The next prime is 66266066641. The reversal of 66266066611 is 11666066266.

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 66266066611 - 2¹ = 66266066609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66266066641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33231735 + ... + 33233728.

It is an arithmetic number, because the mean of its divisors is an integer number (16583133268).

Almost surely, 2^66266066611 is an apocalyptic number.

66266066611 is a deficient number, since it is larger than the sum of its proper divisors (66466461).

66266066611 is an equidigital number, since it uses as much as digits as its factorization.

66266066611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66466460.

The product of its (nonzero) digits is 559872, while the sum is 46.

The spelling of 66266066611 in words is "sixty-six billion, two hundred sixty-six million, sixty-six thousand, six hundred eleven".