666536103 has 12 divisors (see below), whose sum is σ = 963666288. Its totient is φ = 443945760.

The previous prime is 666536089. The next prime is 666536107. The reversal of 666536103 is 301635666.

It is a happy number.

It is not a de Polignac number, because 666536103 - 2⁵ = 666536071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666536107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23883 + ... + 43628.

It is an arithmetic number, because the mean of its divisors is an integer number (80305524).

Almost surely, 2^666536103 is an apocalyptic number.

666536103 is a deficient number, since it is larger than the sum of its proper divisors (297130185).

666536103 is a wasteful number, since it uses less digits than its factorization.

666536103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68614 (or 68611 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 666536103 is about 25817.3604963792. The cubic root of 666536103 is about 873.5234320786.

The spelling of 666536103 in words is "six hundred sixty-six million, five hundred thirty-six thousand, one hundred three".