66266517227 has 4 divisors (see below), whose sum is σ = 69754228680. Its totient is φ = 62778805776.

The previous prime is 66266517217. The next prime is 66266517269. The reversal of 66266517227 is 72271566266.

It is a happy number.

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 66266517227 - 2⁴ = 66266517211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66266517217) 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, 1743855698 + ... + 1743855735.

It is an arithmetic number, because the mean of its divisors is an integer number (17438557170).

Almost surely, 2^66266517227 is an apocalyptic number.

66266517227 is a deficient number, since it is larger than the sum of its proper divisors (3487711453).

66266517227 is a wasteful number, since it uses less digits than its factorization.

66266517227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3487711452.

The product of its digits is 2540160, while the sum is 50.

The spelling of 66266517227 in words is "sixty-six billion, two hundred sixty-six million, five hundred seventeen thousand, two hundred twenty-seven".