666134111 has 2 divisors, whose sum is σ = 666134112. Its totient is φ = 666134110.

The previous prime is 666134101. The next prime is 666134153. The reversal of 666134111 is 111431666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666134111 - 2⁶ = 666134047 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666134101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333067055 + 333067056.

It is an arithmetic number, because the mean of its divisors is an integer number (333067056).

Almost surely, 2^666134111 is an apocalyptic number.

666134111 is a deficient number, since it is larger than the sum of its proper divisors (1).

666134111 is an equidigital number, since it uses as much as digits as its factorization.

666134111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 666134111 is about 25809.5740181817. The cubic root of 666134111 is about 873.3477876552.

Adding to 666134111 its reverse (111431666), we get a palindrome (777565777).

The spelling of 666134111 in words is "six hundred sixty-six million, one hundred thirty-four thousand, one hundred eleven".