666665103 has 32 divisors (see below), whose sum is σ = 1010114560. Its totient is φ = 387711360.

The previous prime is 666665099. The next prime is 666665117. The reversal of 666665103 is 301566666.

666665103 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 666665103 - 2² = 666665099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666665123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 400050 + ... + 401712.

It is an arithmetic number, because the mean of its divisors is an integer number (31566080).

Almost surely, 2^666665103 is an apocalyptic number.

666665103 is a deficient number, since it is larger than the sum of its proper divisors (343449457).

666665103 is a wasteful number, since it uses less digits than its factorization.

666665103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239.

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 666665103 is about 25819.8586944236. The cubic root of 666665103 is about 873.5797817414.

The spelling of 666665103 in words is "six hundred sixty-six million, six hundred sixty-five thousand, one hundred three".