65666326642 has 16 divisors (see below), whose sum is σ = 114965971200. Its totient is φ = 27543930048.

The previous prime is 65666326603. The next prime is 65666326651. The reversal of 65666326642 is 24662366656.

It is a self number, because there is not a number n which added to its sum of digits gives 65666326642.

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, 49897767 + ... + 49899082.

It is an arithmetic number, because the mean of its divisors is an integer number (7185373200).

Almost surely, 2^65666326642 is an apocalyptic number.

65666326642 is a deficient number, since it is larger than the sum of its proper divisors (49299644558).

65666326642 is a wasteful number, since it uses less digits than its factorization.

65666326642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99796905.

The product of its digits is 11197440, while the sum is 52.

The spelling of 65666326642 in words is "sixty-five billion, six hundred sixty-six million, three hundred twenty-six thousand, six hundred forty-two".