12721607440966 has 16 divisors (see below), whose sum is σ = 19740689931600. Its totient is φ = 6141383343648.

The previous prime is 12721607440933. The next prime is 12721607440979. The reversal of 12721607440966 is 66904470612721.

It is a happy number.

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, 3011320 + ... + 5874628.

It is an arithmetic number, because the mean of its divisors is an integer number (1233793120725).

Almost surely, 2^{12721607440966} is an apocalyptic number.

12721607440966 is a deficient number, since it is larger than the sum of its proper divisors (7019082490634).

12721607440966 is a wasteful number, since it uses less digits than its factorization.

12721607440966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2939943.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 12721607440966 in words is "twelve trillion, seven hundred twenty-one billion, six hundred seven million, four hundred forty thousand, nine hundred sixty-six".