666120552206 has 16 divisors (see below), whose sum is σ = 1034480613600. Its totient is φ = 321312464928.

The previous prime is 666120552191. The next prime is 666120552211. The reversal of 666120552206 is 602255021666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4624421 + ... + 4766288.

It is an arithmetic number, because the mean of its divisors is an integer number (64655038350).

Almost surely, 2^666120552206 is an apocalyptic number.

666120552206 is a deficient number, since it is larger than the sum of its proper divisors (368360061394).

666120552206 is a wasteful number, since it uses less digits than its factorization.

666120552206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9391963.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 666120552206 in words is "six hundred sixty-six billion, one hundred twenty million, five hundred fifty-two thousand, two hundred six".