666546103 has 2 divisors, whose sum is σ = 666546104. Its totient is φ = 666546102.

The previous prime is 666546079. The next prime is 666546113. The reversal of 666546103 is 301645666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666546103 - 2⁵ = 666546071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666546113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333273051 + 333273052.

It is an arithmetic number, because the mean of its divisors is an integer number (333273052).

Almost surely, 2^666546103 is an apocalyptic number.

666546103 is a deficient number, since it is larger than the sum of its proper divisors (1).

666546103 is an equidigital number, since it uses as much as digits as its factorization.

666546103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 666546103 is about 25817.5541637855. The cubic root of 666546103 is about 873.5278005295.

The spelling of 666546103 in words is "six hundred sixty-six million, five hundred forty-six thousand, one hundred three".