666512266503 has 8 divisors (see below), whose sum is σ = 895076425600. Its totient is φ = 441144809208.

The previous prime is 666512266489. The next prime is 666512266513. The reversal of 666512266503 is 305662215666.

666512266503 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 666512266503 - 2¹⁴ = 666512250119 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 (666512266513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 799174963 + ... + 799175796.

It is an arithmetic number, because the mean of its divisors is an integer number (111884553200).

Almost surely, 2^666512266503 is an apocalyptic number.

666512266503 is a deficient number, since it is larger than the sum of its proper divisors (228564159097).

666512266503 is a wasteful number, since it uses less digits than its factorization.

666512266503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598350901.

The product of its (nonzero) digits is 2332800, while the sum is 48.

The spelling of 666512266503 in words is "six hundred sixty-six billion, five hundred twelve million, two hundred sixty-six thousand, five hundred three".