13663600669 has 2 divisors, whose sum is σ = 13663600670. Its totient is φ = 13663600668.

The previous prime is 13663600661. The next prime is 13663600747. The reversal of 13663600669 is 96600636631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12715268644 + 948332025 = 112762^2 + 30795^2 .

It is a cyclic number.

It is not a de Polignac number, because 13663600669 - 2³ = 13663600661 is a prime.

It is a super-2 number, since 2×13663600669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13663600661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6831800334 + 6831800335.

It is an arithmetic number, because the mean of its divisors is an integer number (6831800335).

Almost surely, 2^13663600669 is an apocalyptic number.

It is an amenable number.

13663600669 is a deficient number, since it is larger than the sum of its proper divisors (1).

13663600669 is an equidigital number, since it uses as much as digits as its factorization.

13663600669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 46.

The spelling of 13663600669 in words is "thirteen billion, six hundred sixty-three million, six hundred thousand, six hundred sixty-nine".