3966647466694 has 32 divisors (see below), whose sum is σ = 6591360720672. Its totient is φ = 1775306880000.

The previous prime is 3966647466641. The next prime is 3966647466697. The reversal of 3966647466694 is 4966647466693.

It is a self number, because there is not a number n which added to its sum of digits gives 3966647466694.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3966647466697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4529227 + ... + 5333590.

It is an arithmetic number, because the mean of its divisors is an integer number (205980022521).

Almost surely, 2^{3966647466694} is an apocalyptic number.

3966647466694 is a deficient number, since it is larger than the sum of its proper divisors (2624713253978).

3966647466694 is a wasteful number, since it uses less digits than its factorization.

3966647466694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9863112.

The product of its digits is 5079158784, while the sum is 76.

Subtracting 3966647466694 from its reverse (4966647466693), we obtain a palindrome (999999999999).

The spelling of 3966647466694 in words is "three trillion, nine hundred sixty-six billion, six hundred forty-seven million, four hundred sixty-six thousand, six hundred ninety-four".