7969666663633 has 4 divisors (see below), whose sum is σ = 7969780701540. Its totient is φ = 7969552625728.

The previous prime is 7969666663631. The next prime is 7969666663723. The reversal of 7969666663633 is 3363666669697.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4019816482704 + 3949850180929 = 2004948^2 + 1987423^2 .

It is a cyclic number.

It is not a de Polignac number, because 7969666663633 - 2¹ = 7969666663631 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7969666663633.

It is not an unprimeable number, because it can be changed into a prime (7969666663631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56914060 + ... + 57053917.

It is an arithmetic number, because the mean of its divisors is an integer number (1992445175385).

Almost surely, 2^{7969666663633} is an apocalyptic number.

It is an amenable number.

7969666663633 is a deficient number, since it is larger than the sum of its proper divisors (114037907).

7969666663633 is a wasteful number, since it uses less digits than its factorization.

7969666663633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114037906.

The product of its digits is 4285540224, while the sum is 76.

The spelling of 7969666663633 in words is "seven trillion, nine hundred sixty-nine billion, six hundred sixty-six million, six hundred sixty-three thousand, six hundred thirty-three".