667212111127 has 2 divisors, whose sum is σ = 667212111128. Its totient is φ = 667212111126.

The previous prime is 667212111113. The next prime is 667212111143. The reversal of 667212111127 is 721111212766.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667212111127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667212111187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333606055563 + 333606055564.

It is an arithmetic number, because the mean of its divisors is an integer number (333606055564).

Almost surely, 2^667212111127 is an apocalyptic number.

667212111127 is a deficient number, since it is larger than the sum of its proper divisors (1).

667212111127 is an equidigital number, since it uses as much as digits as its factorization.

667212111127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 37.

The spelling of 667212111127 in words is "six hundred sixty-seven billion, two hundred twelve million, one hundred eleven thousand, one hundred twenty-seven".