666127093 has 2 divisors, whose sum is σ = 666127094. Its totient is φ = 666127092.

The previous prime is 666127087. The next prime is 666127151. The reversal of 666127093 is 390721666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 608016964 + 58110129 = 24658^2 + 7623^2 .

It is a cyclic number.

It is not a de Polignac number, because 666127093 - 2⁹ = 666126581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666127043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333063546 + 333063547.

It is an arithmetic number, because the mean of its divisors is an integer number (333063547).

Almost surely, 2^666127093 is an apocalyptic number.

It is an amenable number.

666127093 is a deficient number, since it is larger than the sum of its proper divisors (1).

666127093 is an equidigital number, since it uses as much as digits as its factorization.

666127093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 666127093 is about 25809.4380605235. The cubic root of 666127093 is about 873.3447206170.

The spelling of 666127093 in words is "six hundred sixty-six million, one hundred twenty-seven thousand, ninety-three".