666555203124 has 72 divisors (see below), whose sum is σ = 1773744336000. Its totient is φ = 210471917184.

The previous prime is 666555203101. The next prime is 666555203131. The reversal of 666555203124 is 421302555666.

666555203124 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 666555203124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8723317 + ... + 8799395.

It is an arithmetic number, because the mean of its divisors is an integer number (24635338000).

Almost surely, 2^666555203124 is an apocalyptic number.

It is an amenable number.

666555203124 is an abundant number, since it is smaller than the sum of its proper divisors (1107189132876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666555203124 is a wasteful number, since it uses less digits than its factorization.

666555203124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88917 (or 88912 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 666555203124 in words is "six hundred sixty-six billion, five hundred fifty-five million, two hundred three thousand, one hundred twenty-four".