666666201560 has 32 divisors (see below), whose sum is σ = 1520546891040. Its totient is φ = 263013513984.

The previous prime is 666666201527. The next prime is 666666201601. The reversal of 666666201560 is 65102666666.

It is a junction number, because it is equal to n+sod(n) for n = 666666201499 and 666666201508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114152252 + ... + 114158091.

It is an arithmetic number, because the mean of its divisors is an integer number (47517090345).

Almost surely, 2^666666201560 is an apocalyptic number.

It is an amenable number.

666666201560 is an abundant number, since it is smaller than the sum of its proper divisors (853880689480).

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

666666201560 is a wasteful number, since it uses less digits than its factorization.

666666201560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228310427 (or 228310423 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 50.

The spelling of 666666201560 in words is "six hundred sixty-six billion, six hundred sixty-six million, two hundred one thousand, five hundred sixty".