12653220866 has 32 divisors (see below), whose sum is σ = 22304697408. Its totient is φ = 5307445440.

The previous prime is 12653220857. The next prime is 12653220883. The reversal of 12653220866 is 66802235621.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1804880 + ... + 1811876.

It is an arithmetic number, because the mean of its divisors is an integer number (697021794).

Almost surely, 2^12653220866 is an apocalyptic number.

12653220866 is a deficient number, since it is larger than the sum of its proper divisors (9651476542).

12653220866 is a wasteful number, since it uses less digits than its factorization.

12653220866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13346.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 12653220866 in words is "twelve billion, six hundred fifty-three million, two hundred twenty thousand, eight hundred sixty-six".