7866668107663 has 8 divisors (see below), whose sum is σ = 8077671388800. Its totient is φ = 7658253824088.

The previous prime is 7866668107637. The next prime is 7866668107667. The reversal of 7866668107663 is 3667018666687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7866668107663 - 2¹⁷ = 7866667976591 is a prime.

It is a super-2 number, since 2×7866668107663² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7866668107592 and 7866668107601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7866668107667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647243233 + ... + 647255386.

It is an arithmetic number, because the mean of its divisors is an integer number (1009708923600).

Almost surely, 2^{7866668107663} is an apocalyptic number.

7866668107663 is a deficient number, since it is larger than the sum of its proper divisors (211003281137).

7866668107663 is a wasteful number, since it uses less digits than its factorization.

7866668107663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294498781.

The product of its (nonzero) digits is 438939648, while the sum is 70.

The spelling of 7866668107663 in words is "seven trillion, eight hundred sixty-six billion, six hundred sixty-eight million, one hundred seven thousand, six hundred sixty-three".