666003123601 has 8 divisors (see below), whose sum is σ = 701133216800. Its totient is φ = 630880760160.

The previous prime is 666003123587. The next prime is 666003123613. The reversal of 666003123601 is 106321300666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 666003123601 - 2¹³ = 666003115409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666003123671) 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 in 7 ways as a sum of consecutive naturals, for example, 1755156 + ... + 2100613.

It is an arithmetic number, because the mean of its divisors is an integer number (87641652100).

Almost surely, 2^666003123601 is an apocalyptic number.

It is an amenable number.

666003123601 is a deficient number, since it is larger than the sum of its proper divisors (35130093199).

666003123601 is a wasteful number, since it uses less digits than its factorization.

666003123601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3864879.

The product of its (nonzero) digits is 23328, while the sum is 34.

The spelling of 666003123601 in words is "six hundred sixty-six billion, three million, one hundred twenty-three thousand, six hundred one".