666219103 has 12 divisors (see below), whose sum is σ = 775368720. Its totient is φ = 570025280.

The previous prime is 666219101. The next prime is 666219107. The reversal of 666219103 is 301912666.

It is not a de Polignac number, because 666219103 - 2¹ = 666219101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666219101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159883 + ... + 163996.

It is an arithmetic number, because the mean of its divisors is an integer number (64614060).

Almost surely, 2^666219103 is an apocalyptic number.

666219103 is a deficient number, since it is larger than the sum of its proper divisors (109149617).

666219103 is a wasteful number, since it uses less digits than its factorization.

666219103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323918 (or 323907 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 666219103 is about 25811.2204864474. The cubic root of 666219103 is about 873.3849295346.

The spelling of 666219103 in words is "six hundred sixty-six million, two hundred nineteen thousand, one hundred three".