14656666681 has 2 divisors, whose sum is σ = 14656666682. Its totient is φ = 14656666680.

The previous prime is 14656666663. The next prime is 14656666697. The reversal of 14656666681 is 18666665641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7554391056 + 7102275625 = 86916^2 + 84275^2 .

It is a cyclic number.

It is not a de Polignac number, because 14656666681 - 2¹⁹ = 14656142393 is a prime.

It is a super-2 number, since 2×14656666681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (14656666621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7328333340 + 7328333341.

It is an arithmetic number, because the mean of its divisors is an integer number (7328333341).

Almost surely, 2^14656666681 is an apocalyptic number.

It is an amenable number.

14656666681 is a deficient number, since it is larger than the sum of its proper divisors (1).

14656666681 is an equidigital number, since it uses as much as digits as its factorization.

14656666681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7464960, while the sum is 55.

The spelling of 14656666681 in words is "fourteen billion, six hundred fifty-six million, six hundred sixty-six thousand, six hundred eighty-one".