666252317055103 has 4 divisors (see below), whose sum is σ = 666584944274808. Its totient is φ = 665919689835400.

The previous prime is 666252317055067. The next prime is 666252317055187. The reversal of 666252317055103 is 301550713252666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 666252317055103 - 2⁹ = 666252317054591 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 (666252317055203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166313606848 + ... + 166313610853.

It is an arithmetic number, because the mean of its divisors is an integer number (166646236068702).

Almost surely, 2^{666252317055103} is an apocalyptic number.

666252317055103 is a deficient number, since it is larger than the sum of its proper divisors (332627219705).

666252317055103 is a wasteful number, since it uses less digits than its factorization.

666252317055103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332627219704.

The product of its (nonzero) digits is 6804000, while the sum is 52.

The spelling of 666252317055103 in words is "six hundred sixty-six trillion, two hundred fifty-two billion, three hundred seventeen million, fifty-five thousand, one hundred three".